diff --git a/Gemfile.lock b/Gemfile.lock
index 0decdbe..2890e61 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,7 +2,8 @@ GEM
   remote: http://rubygems.org/
   specs:
     addressable (2.3.2)
-    crack (0.3.1)
+    crack (0.4.3)
+      safe_yaml (~> 1.0.0)
     diff-lcs (1.1.3)
     mime-types (1.19)
     nokogiri (1.5.5)
@@ -20,6 +21,7 @@ GEM
     rspec-expectations (2.11.3)
       diff-lcs (~> 1.1.3)
     rspec-mocks (2.11.3)
+    safe_yaml (1.0.5)
     webmock (1.8.10)
       addressable (>= 2.2.7)
       crack (>= 0.1.7)