diff --git a/Gemfile.lock b/Gemfile.lock
index 14a1302..d94cfeb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -16,8 +16,10 @@ GEM
     arel (2.2.3)
     bcrypt-ruby (3.0.1)
     builder (3.0.0)
+    concurrent-ruby (1.1.5)
     diff-lcs (1.1.3)
-    i18n (0.6.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     multi_json (1.3.2)
     rake (0.8.7)
     rspec (2.9.0)