diff --git a/appendix/package-lock.json b/appendix/package-lock.json
index 88f1f61..cd71313 100644
--- a/appendix/package-lock.json
+++ b/appendix/package-lock.json
@@ -10,7 +10,7 @@
       "license": "ISC",
       "dependencies": {
         "cookie-parser": "^1.4.6",
-        "ejs": "^3.1.8",
+        "ejs": "^6.0.0",
         "express": "^4.18.2",
         "express-session": "^1.17.3"
       }
@@ -27,35 +27,11 @@
         "node": ">= 0.6"
       }
     },
-    "node_modules/ansi-styles": {
-      "version": "4.3.0",
-      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
-      "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
-      "dependencies": {
-        "color-convert": "^2.0.1"
-      },
-      "engines": {
-        "node": ">=8"
-      },
-      "funding": {
-        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
-      }
-    },
     "node_modules/array-flatten": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
       "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg=="
     },
-    "node_modules/async": {
-      "version": "3.2.4",
-      "resolved": "https://registry.npmjs.org/async/-/async-3.2.4.tgz",
-      "integrity": "sha512-iAB+JbDEGXhyIUavoDl9WP/Jj106Kz9DEn1DPgYw5ruDn0e3Wgi3sKFm55sASdGBNOQB8F59d9qQ7deqrHA8wQ=="
-    },
-    "node_modules/balanced-match": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
-      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw=="
-    },
     "node_modules/body-parser": {
       "version": "1.20.3",
       "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.3.tgz",
@@ -79,15 +55,6 @@
         "npm": "1.2.8000 || >= 1.4.16"
       }
     },
-    "node_modules/brace-expansion": {
-      "version": "1.1.11",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
-      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
-      "dependencies": {
-        "balanced-match": "^1.0.0",
-        "concat-map": "0.0.1"
-      }
-    },
     "node_modules/bytes": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
@@ -123,42 +90,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/chalk": {
-      "version": "4.1.2",
-      "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
-      "integrity": "sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==",
-      "dependencies": {
-        "ansi-styles": "^4.1.0",
-        "supports-color": "^7.1.0"
-      },
-      "engines": {
-        "node": ">=10"
-      },
-      "funding": {
-        "url": "https://github.com/chalk/chalk?sponsor=1"
-      }
-    },
-    "node_modules/color-convert": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
-      "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
-      "dependencies": {
-        "color-name": "~1.1.4"
-      },
-      "engines": {
-        "node": ">=7.0.0"
-      }
-    },
-    "node_modules/color-name": {
-      "version": "1.1.4",
-      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
-      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA=="
-    },
-    "node_modules/concat-map": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
-      "integrity": "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg=="
-    },
     "node_modules/content-disposition": {
       "version": "0.5.4",
       "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
@@ -255,17 +186,14 @@
       "integrity": "sha512-WMwm9LhRUo+WUaRN+vRuETqG89IgZphVSNkdFgeb6sS/E4OrDIN7t48CAewSHXc6C8lefD8KKfr5vY61brQlow=="
     },
     "node_modules/ejs": {
-      "version": "3.1.10",
-      "resolved": "https://registry.npmjs.org/ejs/-/ejs-3.1.10.tgz",
-      "integrity": "sha512-UeJmFfOrAQS8OJWPZ4qtgHyWExa088/MtK5UEyoJGFH67cDEXkZSviOiKRCZ4Xij0zxI3JECgYs3oKx+AizQBA==",
-      "dependencies": {
-        "jake": "^10.8.5"
-      },
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/ejs/-/ejs-6.0.1.tgz",
+      "integrity": "sha512-UaaM14yby8U3k02ihS1Bmj5Kz2d7CCQM1scxpgs4Mhkq8F1wR2gl3+Ts4h5Ne4Mnt7M9m4Dw7jsuMr3+xO4vZA==",
       "bin": {
         "ejs": "bin/cli.js"
       },
       "engines": {
-        "node": ">=0.10.0"
+        "node": ">=0.12.18"
       }
     },
     "node_modules/encodeurl": {
@@ -410,33 +338,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/filelist": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/filelist/-/filelist-1.0.4.tgz",
-      "integrity": "sha512-w1cEuf3S+DrLCQL7ET6kz+gmlJdbq9J7yXCSjK/OZCPA+qEN1WyF4ZAf0YYJa4/shHJra2t/d/r8SV4Ji+x+8Q==",
-      "dependencies": {
-        "minimatch": "^5.0.1"
-      }
-    },
-    "node_modules/filelist/node_modules/brace-expansion": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-2.0.1.tgz",
-      "integrity": "sha512-XnAIvQ8eM+kC6aULx6wuQiwVsnzsi9d3WxzV3FpWTGA19F621kwdbsAcFKXgKUHZWsy+mY6iL1sHTxWEFCytDA==",
-      "dependencies": {
-        "balanced-match": "^1.0.0"
-      }
-    },
-    "node_modules/filelist/node_modules/minimatch": {
-      "version": "5.1.4",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-5.1.4.tgz",
-      "integrity": "sha512-U0iNYXt9wALljzfnGkhFSy5sAC6/SCR3JrHrlsdJz4kF8MvhTRQNiC59iUi1iqsitV7abrNAJWElVL9pdnoUgw==",
-      "dependencies": {
-        "brace-expansion": "^2.0.1"
-      },
-      "engines": {
-        "node": ">=10"
-      }
-    },
     "node_modules/finalhandler": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.3.1.tgz",
@@ -524,14 +425,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/has-flag": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
-      "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==",
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/has-symbols": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.1.0.tgz",
@@ -593,23 +486,6 @@
         "node": ">= 0.10"
       }
     },
-    "node_modules/jake": {
-      "version": "10.8.5",
-      "resolved": "https://registry.npmjs.org/jake/-/jake-10.8.5.tgz",
-      "integrity": "sha512-sVpxYeuAhWt0OTWITwT98oyV0GsXyMlXCF+3L1SuafBVUIr/uILGRB+NqwkzhgXKvoJpDIpQvqkUALgdmQsQxw==",
-      "dependencies": {
-        "async": "^3.2.3",
-        "chalk": "^4.0.2",
-        "filelist": "^1.0.1",
-        "minimatch": "^3.0.4"
-      },
-      "bin": {
-        "jake": "bin/cli.js"
-      },
-      "engines": {
-        "node": ">=10"
-      }
-    },
     "node_modules/math-intrinsics": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/math-intrinsics/-/math-intrinsics-1.1.0.tgz",
@@ -672,17 +548,6 @@
         "node": ">= 0.6"
       }
     },
-    "node_modules/minimatch": {
-      "version": "3.1.2",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
-      "integrity": "sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw==",
-      "dependencies": {
-        "brace-expansion": "^1.1.7"
-      },
-      "engines": {
-        "node": "*"
-      }
-    },
     "node_modules/ms": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
@@ -950,17 +815,6 @@
         "node": ">= 0.8"
       }
     },
-    "node_modules/supports-color": {
-      "version": "7.2.0",
-      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
-      "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
-      "dependencies": {
-        "has-flag": "^4.0.0"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/toidentifier": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
@@ -1027,29 +881,11 @@
         "negotiator": "0.6.3"
       }
     },
-    "ansi-styles": {
-      "version": "4.3.0",
-      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
-      "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
-      "requires": {
-        "color-convert": "^2.0.1"
-      }
-    },
     "array-flatten": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
       "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg=="
     },
-    "async": {
-      "version": "3.2.4",
-      "resolved": "https://registry.npmjs.org/async/-/async-3.2.4.tgz",
-      "integrity": "sha512-iAB+JbDEGXhyIUavoDl9WP/Jj106Kz9DEn1DPgYw5ruDn0e3Wgi3sKFm55sASdGBNOQB8F59d9qQ7deqrHA8wQ=="
-    },
-    "balanced-match": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
-      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw=="
-    },
     "body-parser": {
       "version": "1.20.3",
       "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.3.tgz",
@@ -1069,15 +905,6 @@
         "unpipe": "1.0.0"
       }
     },
-    "brace-expansion": {
-      "version": "1.1.11",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
-      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
-      "requires": {
-        "balanced-match": "^1.0.0",
-        "concat-map": "0.0.1"
-      }
-    },
     "bytes": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
@@ -1101,33 +928,6 @@
         "get-intrinsic": "^1.2.6"
       }
     },
-    "chalk": {
-      "version": "4.1.2",
-      "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
-      "integrity": "sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==",
-      "requires": {
-        "ansi-styles": "^4.1.0",
-        "supports-color": "^7.1.0"
-      }
-    },
-    "color-convert": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
-      "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
-      "requires": {
-        "color-name": "~1.1.4"
-      }
-    },
-    "color-name": {
-      "version": "1.1.4",
-      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
-      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA=="
-    },
-    "concat-map": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
-      "integrity": "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg=="
-    },
     "content-disposition": {
       "version": "0.5.4",
       "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
@@ -1201,12 +1001,9 @@
       "integrity": "sha512-WMwm9LhRUo+WUaRN+vRuETqG89IgZphVSNkdFgeb6sS/E4OrDIN7t48CAewSHXc6C8lefD8KKfr5vY61brQlow=="
     },
     "ejs": {
-      "version": "3.1.10",
-      "resolved": "https://registry.npmjs.org/ejs/-/ejs-3.1.10.tgz",
-      "integrity": "sha512-UeJmFfOrAQS8OJWPZ4qtgHyWExa088/MtK5UEyoJGFH67cDEXkZSviOiKRCZ4Xij0zxI3JECgYs3oKx+AizQBA==",
-      "requires": {
-        "jake": "^10.8.5"
-      }
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/ejs/-/ejs-6.0.1.tgz",
+      "integrity": "sha512-UaaM14yby8U3k02ihS1Bmj5Kz2d7CCQM1scxpgs4Mhkq8F1wR2gl3+Ts4h5Ne4Mnt7M9m4Dw7jsuMr3+xO4vZA=="
     },
     "encodeurl": {
       "version": "2.0.0",
@@ -1316,32 +1113,6 @@
         }
       }
     },
-    "filelist": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/filelist/-/filelist-1.0.4.tgz",
-      "integrity": "sha512-w1cEuf3S+DrLCQL7ET6kz+gmlJdbq9J7yXCSjK/OZCPA+qEN1WyF4ZAf0YYJa4/shHJra2t/d/r8SV4Ji+x+8Q==",
-      "requires": {
-        "minimatch": "^5.0.1"
-      },
-      "dependencies": {
-        "brace-expansion": {
-          "version": "2.0.1",
-          "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-2.0.1.tgz",
-          "integrity": "sha512-XnAIvQ8eM+kC6aULx6wuQiwVsnzsi9d3WxzV3FpWTGA19F621kwdbsAcFKXgKUHZWsy+mY6iL1sHTxWEFCytDA==",
-          "requires": {
-            "balanced-match": "^1.0.0"
-          }
-        },
-        "minimatch": {
-          "version": "5.1.4",
-          "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-5.1.4.tgz",
-          "integrity": "sha512-U0iNYXt9wALljzfnGkhFSy5sAC6/SCR3JrHrlsdJz4kF8MvhTRQNiC59iUi1iqsitV7abrNAJWElVL9pdnoUgw==",
-          "requires": {
-            "brace-expansion": "^2.0.1"
-          }
-        }
-      }
-    },
     "finalhandler": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.3.1.tgz",
@@ -1402,11 +1173,6 @@
       "resolved": "https://registry.npmjs.org/gopd/-/gopd-1.2.0.tgz",
       "integrity": "sha512-ZUKRh6/kUFoAiTAtTYPZJ3hw9wNxx+BIBOijnlG9PnrJsCcSjs1wyyD6vJpaYtgnzDrKYRSqf3OO6Rfa93xsRg=="
     },
-    "has-flag": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
-      "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ=="
-    },
     "has-symbols": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.1.0.tgz",
@@ -1450,17 +1216,6 @@
       "resolved": "https://registry.npmjs.org/ipaddr.js/-/ipaddr.js-1.9.1.tgz",
       "integrity": "sha512-0KI/607xoxSToH7GjN1FfSbLoU0+btTicjsQSWQlh/hZykN8KpmMf7uYwPW3R+akZ6R/w18ZlXSHBYXiYUPO3g=="
     },
-    "jake": {
-      "version": "10.8.5",
-      "resolved": "https://registry.npmjs.org/jake/-/jake-10.8.5.tgz",
-      "integrity": "sha512-sVpxYeuAhWt0OTWITwT98oyV0GsXyMlXCF+3L1SuafBVUIr/uILGRB+NqwkzhgXKvoJpDIpQvqkUALgdmQsQxw==",
-      "requires": {
-        "async": "^3.2.3",
-        "chalk": "^4.0.2",
-        "filelist": "^1.0.1",
-        "minimatch": "^3.0.4"
-      }
-    },
     "math-intrinsics": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/math-intrinsics/-/math-intrinsics-1.1.0.tgz",
@@ -1499,14 +1254,6 @@
         "mime-db": "1.52.0"
       }
     },
-    "minimatch": {
-      "version": "3.1.2",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
-      "integrity": "sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw==",
-      "requires": {
-        "brace-expansion": "^1.1.7"
-      }
-    },
     "ms": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
@@ -1690,14 +1437,6 @@
       "resolved": "https://registry.npmjs.org/statuses/-/statuses-2.0.1.tgz",
       "integrity": "sha512-RwNA9Z/7PrK06rYLIzFMlaF+l73iwpzsqRIFgbMLbTcLD6cOao82TaWefPXQvB2fOC4AjuYSEndS7N/mTCbkdQ=="
     },
-    "supports-color": {
-      "version": "7.2.0",
-      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
-      "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
-      "requires": {
-        "has-flag": "^4.0.0"
-      }
-    },
     "toidentifier": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
diff --git a/appendix/package.json b/appendix/package.json
index 10a2a25..bc3bdca 100644
--- a/appendix/package.json
+++ b/appendix/package.json
@@ -11,7 +11,7 @@
   "license": "ISC",
   "dependencies": {
     "cookie-parser": "^1.4.6",
-    "ejs": "^3.1.8",
+    "ejs": "^6.0.0",
     "express": "^4.18.2",
     "express-session": "^1.17.3"
   }
diff --git a/ch5/package-lock.json b/ch5/package-lock.json
index 9589e9f..d80d091 100644
--- a/ch5/package-lock.json
+++ b/ch5/package-lock.json
@@ -9,7 +9,7 @@
       "version": "1.0.0",
       "license": "ISC",
       "dependencies": {
-        "ejs": "^3.1.8",
+        "ejs": "^6.0.0",
         "express": "^4.18.2"
       }
     },
@@ -25,35 +25,11 @@
         "node": ">= 0.6"
       }
     },
-    "node_modules/ansi-styles": {
-      "version": "4.3.0",
-      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
-      "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
-      "dependencies": {
-        "color-convert": "^2.0.1"
-      },
-      "engines": {
-        "node": ">=8"
-      },
-      "funding": {
-        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
-      }
-    },
     "node_modules/array-flatten": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
       "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg=="
     },
-    "node_modules/async": {
-      "version": "3.2.4",
-      "resolved": "https://registry.npmjs.org/async/-/async-3.2.4.tgz",
-      "integrity": "sha512-iAB+JbDEGXhyIUavoDl9WP/Jj106Kz9DEn1DPgYw5ruDn0e3Wgi3sKFm55sASdGBNOQB8F59d9qQ7deqrHA8wQ=="
-    },
-    "node_modules/balanced-match": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
-      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw=="
-    },
     "node_modules/body-parser": {
       "version": "1.20.3",
       "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.3.tgz",
@@ -77,15 +53,6 @@
         "npm": "1.2.8000 || >= 1.4.16"
       }
     },
-    "node_modules/brace-expansion": {
-      "version": "1.1.11",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
-      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
-      "dependencies": {
-        "balanced-match": "^1.0.0",
-        "concat-map": "0.0.1"
-      }
-    },
     "node_modules/bytes": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
@@ -121,42 +88,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/chalk": {
-      "version": "4.1.2",
-      "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
-      "integrity": "sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==",
-      "dependencies": {
-        "ansi-styles": "^4.1.0",
-        "supports-color": "^7.1.0"
-      },
-      "engines": {
-        "node": ">=10"
-      },
-      "funding": {
-        "url": "https://github.com/chalk/chalk?sponsor=1"
-      }
-    },
-    "node_modules/color-convert": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
-      "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
-      "dependencies": {
-        "color-name": "~1.1.4"
-      },
-      "engines": {
-        "node": ">=7.0.0"
-      }
-    },
-    "node_modules/color-name": {
-      "version": "1.1.4",
-      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
-      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA=="
-    },
-    "node_modules/concat-map": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
-      "integrity": "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg=="
-    },
     "node_modules/content-disposition": {
       "version": "0.5.4",
       "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
@@ -233,17 +164,14 @@
       "integrity": "sha512-WMwm9LhRUo+WUaRN+vRuETqG89IgZphVSNkdFgeb6sS/E4OrDIN7t48CAewSHXc6C8lefD8KKfr5vY61brQlow=="
     },
     "node_modules/ejs": {
-      "version": "3.1.10",
-      "resolved": "https://registry.npmjs.org/ejs/-/ejs-3.1.10.tgz",
-      "integrity": "sha512-UeJmFfOrAQS8OJWPZ4qtgHyWExa088/MtK5UEyoJGFH67cDEXkZSviOiKRCZ4Xij0zxI3JECgYs3oKx+AizQBA==",
-      "dependencies": {
-        "jake": "^10.8.5"
-      },
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/ejs/-/ejs-6.0.1.tgz",
+      "integrity": "sha512-UaaM14yby8U3k02ihS1Bmj5Kz2d7CCQM1scxpgs4Mhkq8F1wR2gl3+Ts4h5Ne4Mnt7M9m4Dw7jsuMr3+xO4vZA==",
       "bin": {
         "ejs": "bin/cli.js"
       },
       "engines": {
-        "node": ">=0.10.0"
+        "node": ">=0.12.18"
       }
     },
     "node_modules/encodeurl": {
@@ -353,33 +281,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/filelist": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/filelist/-/filelist-1.0.4.tgz",
-      "integrity": "sha512-w1cEuf3S+DrLCQL7ET6kz+gmlJdbq9J7yXCSjK/OZCPA+qEN1WyF4ZAf0YYJa4/shHJra2t/d/r8SV4Ji+x+8Q==",
-      "dependencies": {
-        "minimatch": "^5.0.1"
-      }
-    },
-    "node_modules/filelist/node_modules/brace-expansion": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-2.0.1.tgz",
-      "integrity": "sha512-XnAIvQ8eM+kC6aULx6wuQiwVsnzsi9d3WxzV3FpWTGA19F621kwdbsAcFKXgKUHZWsy+mY6iL1sHTxWEFCytDA==",
-      "dependencies": {
-        "balanced-match": "^1.0.0"
-      }
-    },
-    "node_modules/filelist/node_modules/minimatch": {
-      "version": "5.1.4",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-5.1.4.tgz",
-      "integrity": "sha512-U0iNYXt9wALljzfnGkhFSy5sAC6/SCR3JrHrlsdJz4kF8MvhTRQNiC59iUi1iqsitV7abrNAJWElVL9pdnoUgw==",
-      "dependencies": {
-        "brace-expansion": "^2.0.1"
-      },
-      "engines": {
-        "node": ">=10"
-      }
-    },
     "node_modules/finalhandler": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.3.1.tgz",
@@ -467,14 +368,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/has-flag": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
-      "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==",
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/has-symbols": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.1.0.tgz",
@@ -536,23 +429,6 @@
         "node": ">= 0.10"
       }
     },
-    "node_modules/jake": {
-      "version": "10.8.5",
-      "resolved": "https://registry.npmjs.org/jake/-/jake-10.8.5.tgz",
-      "integrity": "sha512-sVpxYeuAhWt0OTWITwT98oyV0GsXyMlXCF+3L1SuafBVUIr/uILGRB+NqwkzhgXKvoJpDIpQvqkUALgdmQsQxw==",
-      "dependencies": {
-        "async": "^3.2.3",
-        "chalk": "^4.0.2",
-        "filelist": "^1.0.1",
-        "minimatch": "^3.0.4"
-      },
-      "bin": {
-        "jake": "bin/cli.js"
-      },
-      "engines": {
-        "node": ">=10"
-      }
-    },
     "node_modules/math-intrinsics": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/math-intrinsics/-/math-intrinsics-1.1.0.tgz",
@@ -615,17 +491,6 @@
         "node": ">= 0.6"
       }
     },
-    "node_modules/minimatch": {
-      "version": "3.1.2",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
-      "integrity": "sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw==",
-      "dependencies": {
-        "brace-expansion": "^1.1.7"
-      },
-      "engines": {
-        "node": "*"
-      }
-    },
     "node_modules/ms": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
@@ -877,17 +742,6 @@
         "node": ">= 0.8"
       }
     },
-    "node_modules/supports-color": {
-      "version": "7.2.0",
-      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
-      "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
-      "dependencies": {
-        "has-flag": "^4.0.0"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/toidentifier": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
@@ -943,29 +797,11 @@
         "negotiator": "0.6.3"
       }
     },
-    "ansi-styles": {
-      "version": "4.3.0",
-      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
-      "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
-      "requires": {
-        "color-convert": "^2.0.1"
-      }
-    },
     "array-flatten": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
       "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg=="
     },
-    "async": {
-      "version": "3.2.4",
-      "resolved": "https://registry.npmjs.org/async/-/async-3.2.4.tgz",
-      "integrity": "sha512-iAB+JbDEGXhyIUavoDl9WP/Jj106Kz9DEn1DPgYw5ruDn0e3Wgi3sKFm55sASdGBNOQB8F59d9qQ7deqrHA8wQ=="
-    },
-    "balanced-match": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
-      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw=="
-    },
     "body-parser": {
       "version": "1.20.3",
       "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.3.tgz",
@@ -985,15 +821,6 @@
         "unpipe": "1.0.0"
       }
     },
-    "brace-expansion": {
-      "version": "1.1.11",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
-      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
-      "requires": {
-        "balanced-match": "^1.0.0",
-        "concat-map": "0.0.1"
-      }
-    },
     "bytes": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
@@ -1017,33 +844,6 @@
         "get-intrinsic": "^1.2.6"
       }
     },
-    "chalk": {
-      "version": "4.1.2",
-      "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
-      "integrity": "sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==",
-      "requires": {
-        "ansi-styles": "^4.1.0",
-        "supports-color": "^7.1.0"
-      }
-    },
-    "color-convert": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
-      "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
-      "requires": {
-        "color-name": "~1.1.4"
-      }
-    },
-    "color-name": {
-      "version": "1.1.4",
-      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
-      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA=="
-    },
-    "concat-map": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
-      "integrity": "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg=="
-    },
     "content-disposition": {
       "version": "0.5.4",
       "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
@@ -1101,12 +901,9 @@
       "integrity": "sha512-WMwm9LhRUo+WUaRN+vRuETqG89IgZphVSNkdFgeb6sS/E4OrDIN7t48CAewSHXc6C8lefD8KKfr5vY61brQlow=="
     },
     "ejs": {
-      "version": "3.1.10",
-      "resolved": "https://registry.npmjs.org/ejs/-/ejs-3.1.10.tgz",
-      "integrity": "sha512-UeJmFfOrAQS8OJWPZ4qtgHyWExa088/MtK5UEyoJGFH67cDEXkZSviOiKRCZ4Xij0zxI3JECgYs3oKx+AizQBA==",
-      "requires": {
-        "jake": "^10.8.5"
-      }
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/ejs/-/ejs-6.0.1.tgz",
+      "integrity": "sha512-UaaM14yby8U3k02ihS1Bmj5Kz2d7CCQM1scxpgs4Mhkq8F1wR2gl3+Ts4h5Ne4Mnt7M9m4Dw7jsuMr3+xO4vZA=="
     },
     "encodeurl": {
       "version": "2.0.0",
@@ -1189,32 +986,6 @@
         }
       }
     },
-    "filelist": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/filelist/-/filelist-1.0.4.tgz",
-      "integrity": "sha512-w1cEuf3S+DrLCQL7ET6kz+gmlJdbq9J7yXCSjK/OZCPA+qEN1WyF4ZAf0YYJa4/shHJra2t/d/r8SV4Ji+x+8Q==",
-      "requires": {
-        "minimatch": "^5.0.1"
-      },
-      "dependencies": {
-        "brace-expansion": {
-          "version": "2.0.1",
-          "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-2.0.1.tgz",
-          "integrity": "sha512-XnAIvQ8eM+kC6aULx6wuQiwVsnzsi9d3WxzV3FpWTGA19F621kwdbsAcFKXgKUHZWsy+mY6iL1sHTxWEFCytDA==",
-          "requires": {
-            "balanced-match": "^1.0.0"
-          }
-        },
-        "minimatch": {
-          "version": "5.1.4",
-          "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-5.1.4.tgz",
-          "integrity": "sha512-U0iNYXt9wALljzfnGkhFSy5sAC6/SCR3JrHrlsdJz4kF8MvhTRQNiC59iUi1iqsitV7abrNAJWElVL9pdnoUgw==",
-          "requires": {
-            "brace-expansion": "^2.0.1"
-          }
-        }
-      }
-    },
     "finalhandler": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.3.1.tgz",
@@ -1275,11 +1046,6 @@
       "resolved": "https://registry.npmjs.org/gopd/-/gopd-1.2.0.tgz",
       "integrity": "sha512-ZUKRh6/kUFoAiTAtTYPZJ3hw9wNxx+BIBOijnlG9PnrJsCcSjs1wyyD6vJpaYtgnzDrKYRSqf3OO6Rfa93xsRg=="
     },
-    "has-flag": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
-      "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ=="
-    },
     "has-symbols": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.1.0.tgz",
@@ -1323,17 +1089,6 @@
       "resolved": "https://registry.npmjs.org/ipaddr.js/-/ipaddr.js-1.9.1.tgz",
       "integrity": "sha512-0KI/607xoxSToH7GjN1FfSbLoU0+btTicjsQSWQlh/hZykN8KpmMf7uYwPW3R+akZ6R/w18ZlXSHBYXiYUPO3g=="
     },
-    "jake": {
-      "version": "10.8.5",
-      "resolved": "https://registry.npmjs.org/jake/-/jake-10.8.5.tgz",
-      "integrity": "sha512-sVpxYeuAhWt0OTWITwT98oyV0GsXyMlXCF+3L1SuafBVUIr/uILGRB+NqwkzhgXKvoJpDIpQvqkUALgdmQsQxw==",
-      "requires": {
-        "async": "^3.2.3",
-        "chalk": "^4.0.2",
-        "filelist": "^1.0.1",
-        "minimatch": "^3.0.4"
-      }
-    },
     "math-intrinsics": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/math-intrinsics/-/math-intrinsics-1.1.0.tgz",
@@ -1372,14 +1127,6 @@
         "mime-db": "1.52.0"
       }
     },
-    "minimatch": {
-      "version": "3.1.2",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
-      "integrity": "sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw==",
-      "requires": {
-        "brace-expansion": "^1.1.7"
-      }
-    },
     "ms": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
@@ -1553,14 +1300,6 @@
       "resolved": "https://registry.npmjs.org/statuses/-/statuses-2.0.1.tgz",
       "integrity": "sha512-RwNA9Z/7PrK06rYLIzFMlaF+l73iwpzsqRIFgbMLbTcLD6cOao82TaWefPXQvB2fOC4AjuYSEndS7N/mTCbkdQ=="
     },
-    "supports-color": {
-      "version": "7.2.0",
-      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
-      "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
-      "requires": {
-        "has-flag": "^4.0.0"
-      }
-    },
     "toidentifier": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
diff --git a/ch5/package.json b/ch5/package.json
index 1496134..1c714c0 100644
--- a/ch5/package.json
+++ b/ch5/package.json
@@ -10,7 +10,7 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "ejs": "^3.1.8",
+    "ejs": "^6.0.0",
     "express": "^4.18.2"
   }
 }
diff --git a/ch6/package-lock.json b/ch6/package-lock.json
index 88f1f61..cd71313 100644
--- a/ch6/package-lock.json
+++ b/ch6/package-lock.json
@@ -10,7 +10,7 @@
       "license": "ISC",
       "dependencies": {
         "cookie-parser": "^1.4.6",
-        "ejs": "^3.1.8",
+        "ejs": "^6.0.0",
         "express": "^4.18.2",
         "express-session": "^1.17.3"
       }
@@ -27,35 +27,11 @@
         "node": ">= 0.6"
       }
     },
-    "node_modules/ansi-styles": {
-      "version": "4.3.0",
-      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
-      "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
-      "dependencies": {
-        "color-convert": "^2.0.1"
-      },
-      "engines": {
-        "node": ">=8"
-      },
-      "funding": {
-        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
-      }
-    },
     "node_modules/array-flatten": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
       "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg=="
     },
-    "node_modules/async": {
-      "version": "3.2.4",
-      "resolved": "https://registry.npmjs.org/async/-/async-3.2.4.tgz",
-      "integrity": "sha512-iAB+JbDEGXhyIUavoDl9WP/Jj106Kz9DEn1DPgYw5ruDn0e3Wgi3sKFm55sASdGBNOQB8F59d9qQ7deqrHA8wQ=="
-    },
-    "node_modules/balanced-match": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
-      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw=="
-    },
     "node_modules/body-parser": {
       "version": "1.20.3",
       "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.3.tgz",
@@ -79,15 +55,6 @@
         "npm": "1.2.8000 || >= 1.4.16"
       }
     },
-    "node_modules/brace-expansion": {
-      "version": "1.1.11",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
-      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
-      "dependencies": {
-        "balanced-match": "^1.0.0",
-        "concat-map": "0.0.1"
-      }
-    },
     "node_modules/bytes": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
@@ -123,42 +90,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/chalk": {
-      "version": "4.1.2",
-      "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
-      "integrity": "sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==",
-      "dependencies": {
-        "ansi-styles": "^4.1.0",
-        "supports-color": "^7.1.0"
-      },
-      "engines": {
-        "node": ">=10"
-      },
-      "funding": {
-        "url": "https://github.com/chalk/chalk?sponsor=1"
-      }
-    },
-    "node_modules/color-convert": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
-      "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
-      "dependencies": {
-        "color-name": "~1.1.4"
-      },
-      "engines": {
-        "node": ">=7.0.0"
-      }
-    },
-    "node_modules/color-name": {
-      "version": "1.1.4",
-      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
-      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA=="
-    },
-    "node_modules/concat-map": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
-      "integrity": "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg=="
-    },
     "node_modules/content-disposition": {
       "version": "0.5.4",
       "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
@@ -255,17 +186,14 @@
       "integrity": "sha512-WMwm9LhRUo+WUaRN+vRuETqG89IgZphVSNkdFgeb6sS/E4OrDIN7t48CAewSHXc6C8lefD8KKfr5vY61brQlow=="
     },
     "node_modules/ejs": {
-      "version": "3.1.10",
-      "resolved": "https://registry.npmjs.org/ejs/-/ejs-3.1.10.tgz",
-      "integrity": "sha512-UeJmFfOrAQS8OJWPZ4qtgHyWExa088/MtK5UEyoJGFH67cDEXkZSviOiKRCZ4Xij0zxI3JECgYs3oKx+AizQBA==",
-      "dependencies": {
-        "jake": "^10.8.5"
-      },
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/ejs/-/ejs-6.0.1.tgz",
+      "integrity": "sha512-UaaM14yby8U3k02ihS1Bmj5Kz2d7CCQM1scxpgs4Mhkq8F1wR2gl3+Ts4h5Ne4Mnt7M9m4Dw7jsuMr3+xO4vZA==",
       "bin": {
         "ejs": "bin/cli.js"
       },
       "engines": {
-        "node": ">=0.10.0"
+        "node": ">=0.12.18"
       }
     },
     "node_modules/encodeurl": {
@@ -410,33 +338,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/filelist": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/filelist/-/filelist-1.0.4.tgz",
-      "integrity": "sha512-w1cEuf3S+DrLCQL7ET6kz+gmlJdbq9J7yXCSjK/OZCPA+qEN1WyF4ZAf0YYJa4/shHJra2t/d/r8SV4Ji+x+8Q==",
-      "dependencies": {
-        "minimatch": "^5.0.1"
-      }
-    },
-    "node_modules/filelist/node_modules/brace-expansion": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-2.0.1.tgz",
-      "integrity": "sha512-XnAIvQ8eM+kC6aULx6wuQiwVsnzsi9d3WxzV3FpWTGA19F621kwdbsAcFKXgKUHZWsy+mY6iL1sHTxWEFCytDA==",
-      "dependencies": {
-        "balanced-match": "^1.0.0"
-      }
-    },
-    "node_modules/filelist/node_modules/minimatch": {
-      "version": "5.1.4",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-5.1.4.tgz",
-      "integrity": "sha512-U0iNYXt9wALljzfnGkhFSy5sAC6/SCR3JrHrlsdJz4kF8MvhTRQNiC59iUi1iqsitV7abrNAJWElVL9pdnoUgw==",
-      "dependencies": {
-        "brace-expansion": "^2.0.1"
-      },
-      "engines": {
-        "node": ">=10"
-      }
-    },
     "node_modules/finalhandler": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.3.1.tgz",
@@ -524,14 +425,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/has-flag": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
-      "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==",
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/has-symbols": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.1.0.tgz",
@@ -593,23 +486,6 @@
         "node": ">= 0.10"
       }
     },
-    "node_modules/jake": {
-      "version": "10.8.5",
-      "resolved": "https://registry.npmjs.org/jake/-/jake-10.8.5.tgz",
-      "integrity": "sha512-sVpxYeuAhWt0OTWITwT98oyV0GsXyMlXCF+3L1SuafBVUIr/uILGRB+NqwkzhgXKvoJpDIpQvqkUALgdmQsQxw==",
-      "dependencies": {
-        "async": "^3.2.3",
-        "chalk": "^4.0.2",
-        "filelist": "^1.0.1",
-        "minimatch": "^3.0.4"
-      },
-      "bin": {
-        "jake": "bin/cli.js"
-      },
-      "engines": {
-        "node": ">=10"
-      }
-    },
     "node_modules/math-intrinsics": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/math-intrinsics/-/math-intrinsics-1.1.0.tgz",
@@ -672,17 +548,6 @@
         "node": ">= 0.6"
       }
     },
-    "node_modules/minimatch": {
-      "version": "3.1.2",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
-      "integrity": "sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw==",
-      "dependencies": {
-        "brace-expansion": "^1.1.7"
-      },
-      "engines": {
-        "node": "*"
-      }
-    },
     "node_modules/ms": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
@@ -950,17 +815,6 @@
         "node": ">= 0.8"
       }
     },
-    "node_modules/supports-color": {
-      "version": "7.2.0",
-      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
-      "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
-      "dependencies": {
-        "has-flag": "^4.0.0"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/toidentifier": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
@@ -1027,29 +881,11 @@
         "negotiator": "0.6.3"
       }
     },
-    "ansi-styles": {
-      "version": "4.3.0",
-      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
-      "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
-      "requires": {
-        "color-convert": "^2.0.1"
-      }
-    },
     "array-flatten": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
       "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg=="
     },
-    "async": {
-      "version": "3.2.4",
-      "resolved": "https://registry.npmjs.org/async/-/async-3.2.4.tgz",
-      "integrity": "sha512-iAB+JbDEGXhyIUavoDl9WP/Jj106Kz9DEn1DPgYw5ruDn0e3Wgi3sKFm55sASdGBNOQB8F59d9qQ7deqrHA8wQ=="
-    },
-    "balanced-match": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
-      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw=="
-    },
     "body-parser": {
       "version": "1.20.3",
       "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.3.tgz",
@@ -1069,15 +905,6 @@
         "unpipe": "1.0.0"
       }
     },
-    "brace-expansion": {
-      "version": "1.1.11",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
-      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
-      "requires": {
-        "balanced-match": "^1.0.0",
-        "concat-map": "0.0.1"
-      }
-    },
     "bytes": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
@@ -1101,33 +928,6 @@
         "get-intrinsic": "^1.2.6"
       }
     },
-    "chalk": {
-      "version": "4.1.2",
-      "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
-      "integrity": "sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==",
-      "requires": {
-        "ansi-styles": "^4.1.0",
-        "supports-color": "^7.1.0"
-      }
-    },
-    "color-convert": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
-      "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
-      "requires": {
-        "color-name": "~1.1.4"
-      }
-    },
-    "color-name": {
-      "version": "1.1.4",
-      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
-      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA=="
-    },
-    "concat-map": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
-      "integrity": "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg=="
-    },
     "content-disposition": {
       "version": "0.5.4",
       "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
@@ -1201,12 +1001,9 @@
       "integrity": "sha512-WMwm9LhRUo+WUaRN+vRuETqG89IgZphVSNkdFgeb6sS/E4OrDIN7t48CAewSHXc6C8lefD8KKfr5vY61brQlow=="
     },
     "ejs": {
-      "version": "3.1.10",
-      "resolved": "https://registry.npmjs.org/ejs/-/ejs-3.1.10.tgz",
-      "integrity": "sha512-UeJmFfOrAQS8OJWPZ4qtgHyWExa088/MtK5UEyoJGFH67cDEXkZSviOiKRCZ4Xij0zxI3JECgYs3oKx+AizQBA==",
-      "requires": {
-        "jake": "^10.8.5"
-      }
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/ejs/-/ejs-6.0.1.tgz",
+      "integrity": "sha512-UaaM14yby8U3k02ihS1Bmj5Kz2d7CCQM1scxpgs4Mhkq8F1wR2gl3+Ts4h5Ne4Mnt7M9m4Dw7jsuMr3+xO4vZA=="
     },
     "encodeurl": {
       "version": "2.0.0",
@@ -1316,32 +1113,6 @@
         }
       }
     },
-    "filelist": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/filelist/-/filelist-1.0.4.tgz",
-      "integrity": "sha512-w1cEuf3S+DrLCQL7ET6kz+gmlJdbq9J7yXCSjK/OZCPA+qEN1WyF4ZAf0YYJa4/shHJra2t/d/r8SV4Ji+x+8Q==",
-      "requires": {
-        "minimatch": "^5.0.1"
-      },
-      "dependencies": {
-        "brace-expansion": {
-          "version": "2.0.1",
-          "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-2.0.1.tgz",
-          "integrity": "sha512-XnAIvQ8eM+kC6aULx6wuQiwVsnzsi9d3WxzV3FpWTGA19F621kwdbsAcFKXgKUHZWsy+mY6iL1sHTxWEFCytDA==",
-          "requires": {
-            "balanced-match": "^1.0.0"
-          }
-        },
-        "minimatch": {
-          "version": "5.1.4",
-          "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-5.1.4.tgz",
-          "integrity": "sha512-U0iNYXt9wALljzfnGkhFSy5sAC6/SCR3JrHrlsdJz4kF8MvhTRQNiC59iUi1iqsitV7abrNAJWElVL9pdnoUgw==",
-          "requires": {
-            "brace-expansion": "^2.0.1"
-          }
-        }
-      }
-    },
     "finalhandler": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.3.1.tgz",
@@ -1402,11 +1173,6 @@
       "resolved": "https://registry.npmjs.org/gopd/-/gopd-1.2.0.tgz",
       "integrity": "sha512-ZUKRh6/kUFoAiTAtTYPZJ3hw9wNxx+BIBOijnlG9PnrJsCcSjs1wyyD6vJpaYtgnzDrKYRSqf3OO6Rfa93xsRg=="
     },
-    "has-flag": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
-      "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ=="
-    },
     "has-symbols": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.1.0.tgz",
@@ -1450,17 +1216,6 @@
       "resolved": "https://registry.npmjs.org/ipaddr.js/-/ipaddr.js-1.9.1.tgz",
       "integrity": "sha512-0KI/607xoxSToH7GjN1FfSbLoU0+btTicjsQSWQlh/hZykN8KpmMf7uYwPW3R+akZ6R/w18ZlXSHBYXiYUPO3g=="
     },
-    "jake": {
-      "version": "10.8.5",
-      "resolved": "https://registry.npmjs.org/jake/-/jake-10.8.5.tgz",
-      "integrity": "sha512-sVpxYeuAhWt0OTWITwT98oyV0GsXyMlXCF+3L1SuafBVUIr/uILGRB+NqwkzhgXKvoJpDIpQvqkUALgdmQsQxw==",
-      "requires": {
-        "async": "^3.2.3",
-        "chalk": "^4.0.2",
-        "filelist": "^1.0.1",
-        "minimatch": "^3.0.4"
-      }
-    },
     "math-intrinsics": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/math-intrinsics/-/math-intrinsics-1.1.0.tgz",
@@ -1499,14 +1254,6 @@
         "mime-db": "1.52.0"
       }
     },
-    "minimatch": {
-      "version": "3.1.2",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
-      "integrity": "sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw==",
-      "requires": {
-        "brace-expansion": "^1.1.7"
-      }
-    },
     "ms": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
@@ -1690,14 +1437,6 @@
       "resolved": "https://registry.npmjs.org/statuses/-/statuses-2.0.1.tgz",
       "integrity": "sha512-RwNA9Z/7PrK06rYLIzFMlaF+l73iwpzsqRIFgbMLbTcLD6cOao82TaWefPXQvB2fOC4AjuYSEndS7N/mTCbkdQ=="
     },
-    "supports-color": {
-      "version": "7.2.0",
-      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
-      "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
-      "requires": {
-        "has-flag": "^4.0.0"
-      }
-    },
     "toidentifier": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
diff --git a/ch6/package.json b/ch6/package.json
index 10a2a25..bc3bdca 100644
--- a/ch6/package.json
+++ b/ch6/package.json
@@ -11,7 +11,7 @@
   "license": "ISC",
   "dependencies": {
     "cookie-parser": "^1.4.6",
-    "ejs": "^3.1.8",
+    "ejs": "^6.0.0",
     "express": "^4.18.2",
     "express-session": "^1.17.3"
   }
diff --git a/ch7/package-lock.json b/ch7/package-lock.json
index 88f1f61..cd71313 100644
--- a/ch7/package-lock.json
+++ b/ch7/package-lock.json
@@ -10,7 +10,7 @@
       "license": "ISC",
       "dependencies": {
         "cookie-parser": "^1.4.6",
-        "ejs": "^3.1.8",
+        "ejs": "^6.0.0",
         "express": "^4.18.2",
         "express-session": "^1.17.3"
       }
@@ -27,35 +27,11 @@
         "node": ">= 0.6"
       }
     },
-    "node_modules/ansi-styles": {
-      "version": "4.3.0",
-      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
-      "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
-      "dependencies": {
-        "color-convert": "^2.0.1"
-      },
-      "engines": {
-        "node": ">=8"
-      },
-      "funding": {
-        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
-      }
-    },
     "node_modules/array-flatten": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
       "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg=="
     },
-    "node_modules/async": {
-      "version": "3.2.4",
-      "resolved": "https://registry.npmjs.org/async/-/async-3.2.4.tgz",
-      "integrity": "sha512-iAB+JbDEGXhyIUavoDl9WP/Jj106Kz9DEn1DPgYw5ruDn0e3Wgi3sKFm55sASdGBNOQB8F59d9qQ7deqrHA8wQ=="
-    },
-    "node_modules/balanced-match": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
-      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw=="
-    },
     "node_modules/body-parser": {
       "version": "1.20.3",
       "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.3.tgz",
@@ -79,15 +55,6 @@
         "npm": "1.2.8000 || >= 1.4.16"
       }
     },
-    "node_modules/brace-expansion": {
-      "version": "1.1.11",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
-      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
-      "dependencies": {
-        "balanced-match": "^1.0.0",
-        "concat-map": "0.0.1"
-      }
-    },
     "node_modules/bytes": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
@@ -123,42 +90,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/chalk": {
-      "version": "4.1.2",
-      "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
-      "integrity": "sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==",
-      "dependencies": {
-        "ansi-styles": "^4.1.0",
-        "supports-color": "^7.1.0"
-      },
-      "engines": {
-        "node": ">=10"
-      },
-      "funding": {
-        "url": "https://github.com/chalk/chalk?sponsor=1"
-      }
-    },
-    "node_modules/color-convert": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
-      "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
-      "dependencies": {
-        "color-name": "~1.1.4"
-      },
-      "engines": {
-        "node": ">=7.0.0"
-      }
-    },
-    "node_modules/color-name": {
-      "version": "1.1.4",
-      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
-      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA=="
-    },
-    "node_modules/concat-map": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
-      "integrity": "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg=="
-    },
     "node_modules/content-disposition": {
       "version": "0.5.4",
       "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
@@ -255,17 +186,14 @@
       "integrity": "sha512-WMwm9LhRUo+WUaRN+vRuETqG89IgZphVSNkdFgeb6sS/E4OrDIN7t48CAewSHXc6C8lefD8KKfr5vY61brQlow=="
     },
     "node_modules/ejs": {
-      "version": "3.1.10",
-      "resolved": "https://registry.npmjs.org/ejs/-/ejs-3.1.10.tgz",
-      "integrity": "sha512-UeJmFfOrAQS8OJWPZ4qtgHyWExa088/MtK5UEyoJGFH67cDEXkZSviOiKRCZ4Xij0zxI3JECgYs3oKx+AizQBA==",
-      "dependencies": {
-        "jake": "^10.8.5"
-      },
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/ejs/-/ejs-6.0.1.tgz",
+      "integrity": "sha512-UaaM14yby8U3k02ihS1Bmj5Kz2d7CCQM1scxpgs4Mhkq8F1wR2gl3+Ts4h5Ne4Mnt7M9m4Dw7jsuMr3+xO4vZA==",
       "bin": {
         "ejs": "bin/cli.js"
       },
       "engines": {
-        "node": ">=0.10.0"
+        "node": ">=0.12.18"
       }
     },
     "node_modules/encodeurl": {
@@ -410,33 +338,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/filelist": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/filelist/-/filelist-1.0.4.tgz",
-      "integrity": "sha512-w1cEuf3S+DrLCQL7ET6kz+gmlJdbq9J7yXCSjK/OZCPA+qEN1WyF4ZAf0YYJa4/shHJra2t/d/r8SV4Ji+x+8Q==",
-      "dependencies": {
-        "minimatch": "^5.0.1"
-      }
-    },
-    "node_modules/filelist/node_modules/brace-expansion": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-2.0.1.tgz",
-      "integrity": "sha512-XnAIvQ8eM+kC6aULx6wuQiwVsnzsi9d3WxzV3FpWTGA19F621kwdbsAcFKXgKUHZWsy+mY6iL1sHTxWEFCytDA==",
-      "dependencies": {
-        "balanced-match": "^1.0.0"
-      }
-    },
-    "node_modules/filelist/node_modules/minimatch": {
-      "version": "5.1.4",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-5.1.4.tgz",
-      "integrity": "sha512-U0iNYXt9wALljzfnGkhFSy5sAC6/SCR3JrHrlsdJz4kF8MvhTRQNiC59iUi1iqsitV7abrNAJWElVL9pdnoUgw==",
-      "dependencies": {
-        "brace-expansion": "^2.0.1"
-      },
-      "engines": {
-        "node": ">=10"
-      }
-    },
     "node_modules/finalhandler": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.3.1.tgz",
@@ -524,14 +425,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/has-flag": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
-      "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==",
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/has-symbols": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.1.0.tgz",
@@ -593,23 +486,6 @@
         "node": ">= 0.10"
       }
     },
-    "node_modules/jake": {
-      "version": "10.8.5",
-      "resolved": "https://registry.npmjs.org/jake/-/jake-10.8.5.tgz",
-      "integrity": "sha512-sVpxYeuAhWt0OTWITwT98oyV0GsXyMlXCF+3L1SuafBVUIr/uILGRB+NqwkzhgXKvoJpDIpQvqkUALgdmQsQxw==",
-      "dependencies": {
-        "async": "^3.2.3",
-        "chalk": "^4.0.2",
-        "filelist": "^1.0.1",
-        "minimatch": "^3.0.4"
-      },
-      "bin": {
-        "jake": "bin/cli.js"
-      },
-      "engines": {
-        "node": ">=10"
-      }
-    },
     "node_modules/math-intrinsics": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/math-intrinsics/-/math-intrinsics-1.1.0.tgz",
@@ -672,17 +548,6 @@
         "node": ">= 0.6"
       }
     },
-    "node_modules/minimatch": {
-      "version": "3.1.2",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
-      "integrity": "sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw==",
-      "dependencies": {
-        "brace-expansion": "^1.1.7"
-      },
-      "engines": {
-        "node": "*"
-      }
-    },
     "node_modules/ms": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
@@ -950,17 +815,6 @@
         "node": ">= 0.8"
       }
     },
-    "node_modules/supports-color": {
-      "version": "7.2.0",
-      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
-      "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
-      "dependencies": {
-        "has-flag": "^4.0.0"
-      },
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/toidentifier": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
@@ -1027,29 +881,11 @@
         "negotiator": "0.6.3"
       }
     },
-    "ansi-styles": {
-      "version": "4.3.0",
-      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
-      "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
-      "requires": {
-        "color-convert": "^2.0.1"
-      }
-    },
     "array-flatten": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
       "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg=="
     },
-    "async": {
-      "version": "3.2.4",
-      "resolved": "https://registry.npmjs.org/async/-/async-3.2.4.tgz",
-      "integrity": "sha512-iAB+JbDEGXhyIUavoDl9WP/Jj106Kz9DEn1DPgYw5ruDn0e3Wgi3sKFm55sASdGBNOQB8F59d9qQ7deqrHA8wQ=="
-    },
-    "balanced-match": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
-      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw=="
-    },
     "body-parser": {
       "version": "1.20.3",
       "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.3.tgz",
@@ -1069,15 +905,6 @@
         "unpipe": "1.0.0"
       }
     },
-    "brace-expansion": {
-      "version": "1.1.11",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
-      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
-      "requires": {
-        "balanced-match": "^1.0.0",
-        "concat-map": "0.0.1"
-      }
-    },
     "bytes": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
@@ -1101,33 +928,6 @@
         "get-intrinsic": "^1.2.6"
       }
     },
-    "chalk": {
-      "version": "4.1.2",
-      "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
-      "integrity": "sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==",
-      "requires": {
-        "ansi-styles": "^4.1.0",
-        "supports-color": "^7.1.0"
-      }
-    },
-    "color-convert": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
-      "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
-      "requires": {
-        "color-name": "~1.1.4"
-      }
-    },
-    "color-name": {
-      "version": "1.1.4",
-      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
-      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA=="
-    },
-    "concat-map": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
-      "integrity": "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg=="
-    },
     "content-disposition": {
       "version": "0.5.4",
       "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
@@ -1201,12 +1001,9 @@
       "integrity": "sha512-WMwm9LhRUo+WUaRN+vRuETqG89IgZphVSNkdFgeb6sS/E4OrDIN7t48CAewSHXc6C8lefD8KKfr5vY61brQlow=="
     },
     "ejs": {
-      "version": "3.1.10",
-      "resolved": "https://registry.npmjs.org/ejs/-/ejs-3.1.10.tgz",
-      "integrity": "sha512-UeJmFfOrAQS8OJWPZ4qtgHyWExa088/MtK5UEyoJGFH67cDEXkZSviOiKRCZ4Xij0zxI3JECgYs3oKx+AizQBA==",
-      "requires": {
-        "jake": "^10.8.5"
-      }
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/ejs/-/ejs-6.0.1.tgz",
+      "integrity": "sha512-UaaM14yby8U3k02ihS1Bmj5Kz2d7CCQM1scxpgs4Mhkq8F1wR2gl3+Ts4h5Ne4Mnt7M9m4Dw7jsuMr3+xO4vZA=="
     },
     "encodeurl": {
       "version": "2.0.0",
@@ -1316,32 +1113,6 @@
         }
       }
     },
-    "filelist": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/filelist/-/filelist-1.0.4.tgz",
-      "integrity": "sha512-w1cEuf3S+DrLCQL7ET6kz+gmlJdbq9J7yXCSjK/OZCPA+qEN1WyF4ZAf0YYJa4/shHJra2t/d/r8SV4Ji+x+8Q==",
-      "requires": {
-        "minimatch": "^5.0.1"
-      },
-      "dependencies": {
-        "brace-expansion": {
-          "version": "2.0.1",
-          "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-2.0.1.tgz",
-          "integrity": "sha512-XnAIvQ8eM+kC6aULx6wuQiwVsnzsi9d3WxzV3FpWTGA19F621kwdbsAcFKXgKUHZWsy+mY6iL1sHTxWEFCytDA==",
-          "requires": {
-            "balanced-match": "^1.0.0"
-          }
-        },
-        "minimatch": {
-          "version": "5.1.4",
-          "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-5.1.4.tgz",
-          "integrity": "sha512-U0iNYXt9wALljzfnGkhFSy5sAC6/SCR3JrHrlsdJz4kF8MvhTRQNiC59iUi1iqsitV7abrNAJWElVL9pdnoUgw==",
-          "requires": {
-            "brace-expansion": "^2.0.1"
-          }
-        }
-      }
-    },
     "finalhandler": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.3.1.tgz",
@@ -1402,11 +1173,6 @@
       "resolved": "https://registry.npmjs.org/gopd/-/gopd-1.2.0.tgz",
       "integrity": "sha512-ZUKRh6/kUFoAiTAtTYPZJ3hw9wNxx+BIBOijnlG9PnrJsCcSjs1wyyD6vJpaYtgnzDrKYRSqf3OO6Rfa93xsRg=="
     },
-    "has-flag": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
-      "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ=="
-    },
     "has-symbols": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.1.0.tgz",
@@ -1450,17 +1216,6 @@
       "resolved": "https://registry.npmjs.org/ipaddr.js/-/ipaddr.js-1.9.1.tgz",
       "integrity": "sha512-0KI/607xoxSToH7GjN1FfSbLoU0+btTicjsQSWQlh/hZykN8KpmMf7uYwPW3R+akZ6R/w18ZlXSHBYXiYUPO3g=="
     },
-    "jake": {
-      "version": "10.8.5",
-      "resolved": "https://registry.npmjs.org/jake/-/jake-10.8.5.tgz",
-      "integrity": "sha512-sVpxYeuAhWt0OTWITwT98oyV0GsXyMlXCF+3L1SuafBVUIr/uILGRB+NqwkzhgXKvoJpDIpQvqkUALgdmQsQxw==",
-      "requires": {
-        "async": "^3.2.3",
-        "chalk": "^4.0.2",
-        "filelist": "^1.0.1",
-        "minimatch": "^3.0.4"
-      }
-    },
     "math-intrinsics": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/math-intrinsics/-/math-intrinsics-1.1.0.tgz",
@@ -1499,14 +1254,6 @@
         "mime-db": "1.52.0"
       }
     },
-    "minimatch": {
-      "version": "3.1.2",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
-      "integrity": "sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw==",
-      "requires": {
-        "brace-expansion": "^1.1.7"
-      }
-    },
     "ms": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
@@ -1690,14 +1437,6 @@
       "resolved": "https://registry.npmjs.org/statuses/-/statuses-2.0.1.tgz",
       "integrity": "sha512-RwNA9Z/7PrK06rYLIzFMlaF+l73iwpzsqRIFgbMLbTcLD6cOao82TaWefPXQvB2fOC4AjuYSEndS7N/mTCbkdQ=="
     },
-    "supports-color": {
-      "version": "7.2.0",
-      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
-      "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
-      "requires": {
-        "has-flag": "^4.0.0"
-      }
-    },
     "toidentifier": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
diff --git a/ch7/package.json b/ch7/package.json
index 10a2a25..bc3bdca 100644
--- a/ch7/package.json
+++ b/ch7/package.json
@@ -11,7 +11,7 @@
   "license": "ISC",
   "dependencies": {
     "cookie-parser": "^1.4.6",
-    "ejs": "^3.1.8",
+    "ejs": "^6.0.0",
     "express": "^4.18.2",
     "express-session": "^1.17.3"
   }