diff --git a/Gemfile.lock b/Gemfile.lock
index d0199de..d1cbdc6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -124,7 +124,7 @@ GEM
     pygments.rb (0.6.3)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.2.0)
-    rack (1.6.4)
+    rack (1.6.12)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.3)