diff --git a/Gemfile.lock b/Gemfile.lock
index 38850b7..d69cdc4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -74,7 +74,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    rack (1.6.11)
+    rack (1.6.13)
     rack-cors (1.0.5)
       rack (>= 1.6.0)
     rack-protection (1.5.5)