diff --git a/Gemfile.lock b/Gemfile.lock
index e0d6a31e..c5e6e418 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -197,7 +197,7 @@ GEM
     parser (2.2.2.6)
       ast (>= 1.1, < 3.0)
     procto (0.0.2)
-    rack (1.6.4)
+    rack (1.6.13)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.3)