diff --git a/TurbolinksDemo/server/Gemfile.lock b/TurbolinksDemo/server/Gemfile.lock
index 0e6b8af..14d8fbe 100644
--- a/TurbolinksDemo/server/Gemfile.lock
+++ b/TurbolinksDemo/server/Gemfile.lock
@@ -3,7 +3,7 @@ GEM
   specs:
     backports (3.6.8)
     multi_json (1.11.2)
-    rack (1.6.4)
+    rack (1.6.13)
     rack-protection (1.5.3)
       rack
     rack-test (0.6.3)