diff --git a/Gemfile.lock b/Gemfile.lock
index 5a934fa1d..e44be91f1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -5,7 +5,7 @@ GEM
     eventmachine (0.12.10)
     maruku (0.6.0)
       syntax (>= 1.0.0)
-    rack (1.3.0)
+    rack (1.6.13)
     sinatra (1.2.6)
       rack (~> 1.1)
       tilt (>= 1.2.2, < 2.0)