diff --git a/Gemfile.lock b/Gemfile.lock
index 2fd5749..f15e3e6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -36,7 +36,7 @@ GEM
     posix-spawn (0.3.6)
     rake (0.9.2.2)
     rdiscount (1.6.8)
-    rubyzip (0.9.5)
+    rubyzip (2.0.0)
     syntax (1.0.0)
     term-ansicolor (1.0.7)
     thor (0.14.6)