diff --git a/Gemfile.lock b/Gemfile.lock
index fff9e2aa..caaad4ee 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -22,7 +22,7 @@ GEM
     jruby-jars (9.1.5.0)
     jruby-rack (1.1.20)
     multi_json (1.11.2)
-    rack (1.6.4)
+    rack (1.6.13)
     rake (10.5.0)
     rb-fsevent (0.9.7)
     rb-inotify (0.9.7)