diff --git a/src/index.coffee b/src/index.coffee
index e28f296..17dcf2b 100644
--- a/src/index.coffee
+++ b/src/index.coffee
@@ -78,7 +78,7 @@ cards = [
   }
   {
       type: 'mastercard',
-      pattern: /^(5[1-5]|677189)|^(222[1-9]|2[3-6]\d{2}|27[0-1]\d|2720)/,
+      pattern: /^(5[1-5]|677189)|^(22[2-9][1-9]|2[3-6]\d{2}|27[0-1]\d|2720)/,
       format: defaultFormat,
       length: [16],
       cvcLength: [3],