diff --git a/Gemfile.lock b/Gemfile.lock
index 7635f2b..18ffa0e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -48,7 +48,8 @@ GEM
       rest-client
       simplecov (>= 0.7)
       thor
-    crack (0.3.2)
+    crack (0.4.0)
+      safe_yaml (~> 0.9.0)
     devise (2.2.4)
       bcrypt-ruby (~> 3.0)
       orm_adapter (~> 0.1)