diff --git a/Gemfile.lock b/Gemfile.lock
index 9e96e527..8ac57725 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -102,7 +102,7 @@ GEM
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    rack (1.6.4)
+    rack (1.6.13)
     rake (10.4.2)
     rspec (3.3.0)
       rspec-core (~> 3.3.0)