diff --git a/ruby/examples/Gemfile.lock b/ruby/examples/Gemfile.lock
index ad273011..5663c4df 100644
--- a/ruby/examples/Gemfile.lock
+++ b/ruby/examples/Gemfile.lock
@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    rack (1.6.4)
+    rack (1.6.13)
     rack-protection (1.5.3)
       rack
     sinatra (1.4.6)