diff --git a/Gemfile.lock b/Gemfile.lock
index 64ec3ba..48a6c01 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -18,8 +18,10 @@ GEM
       multi_json (~> 1.0)
     arel (3.0.2)
     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 (1.3.6)
     pg (0.14.0)
     psych (1.3.3)