diff --git a/Gemfile.lock b/Gemfile.lock
index f81ee45..4b60645 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -11,8 +11,10 @@ GEM
     bson_ext (1.7.0)
       bson (~> 1.7.0)
     builder (3.0.3)
+    concurrent-ruby (1.1.7)
     git (1.2.5)
-    i18n (0.6.1)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jeweler (1.8.4)
       bundler (~> 1.0)
       git (>= 1.2.5)