diff --git a/Games/javascript-delta-master/Gemfile.lock b/Games/javascript-delta-master/Gemfile.lock
index a74a622..83fdf7d 100644
--- a/Games/javascript-delta-master/Gemfile.lock
+++ b/Games/javascript-delta-master/Gemfile.lock
@@ -3,7 +3,7 @@ GEM
   specs:
     daemons (1.1.9)
     eventmachine (1.0.3)
-    rack (1.5.2)
+    rack (2.1.4.3)
     thin (1.6.2)
       daemons (>= 1.0.9)
       eventmachine (>= 1.0.0)