diff --git a/Gemfile.lock b/Gemfile.lock
index 48b49d4..75db994 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -129,7 +129,7 @@ GEM
       cucumber (>= 0.8)
       rake
     powerpack (0.1.1)
-    rack (1.6.4)
+    rack (1.6.12)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.3)