diff --git a/Gemfile.lock b/Gemfile.lock
index d50566ad..8bb9294e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -44,11 +44,13 @@ GEM
       tzinfo (~> 1.1)
     arel (6.0.0)
     builder (3.2.2)
+    concurrent-ruby (1.1.10)
     erubis (2.7.0)
     execjs (2.5.2)
     globalid (0.3.5)
       activesupport (>= 4.1.0)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jquery-rails (4.0.3)
       rails-dom-testing (~> 1.0)
       railties (>= 4.2.0)