diff --git a/Gemfile.lock b/Gemfile.lock
index e2c665b..bdcc6a1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -147,7 +147,7 @@ GEM
     rdoc (3.12.2)
       json (~> 1.4)
     ref (2.0.0)
-    rubyzip (0.9.9)
+    rubyzip (2.0.0)
     sass (3.4.25)
     sass-rails (3.2.6)
       railties (~> 3.2.0)