diff --git a/Gemfile.lock b/Gemfile.lock
index 840bd57..9fcbcb1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -202,7 +202,7 @@ GEM
       premailer (~> 1.7, >= 1.7.9)
     rabl (0.9.4.pre1)
       activesupport (>= 2.3.14)
-    rack (1.6.4)
+    rack (1.6.12)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.4)