diff --git a/Gemfile.lock b/Gemfile.lock
index b7404fc..f60ea79 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -59,7 +59,8 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.3.3)
-    crack (0.3.1)
+    crack (0.4.3)
+      safe_yaml (~> 1.0.0)
     cucumber (1.2.1)
       builder (>= 2.1.2)
       diff-lcs (>= 1.1.3)
@@ -217,6 +218,7 @@ GEM
       railties (>= 3.0)
       rspec (~> 2.11.0)
     rubyzip (0.9.8)
+    safe_yaml (1.0.5)
     sass (3.2.1)
     sass-rails (3.2.5)
       railties (~> 3.2.0)