diff --git a/Gemfile.lock b/Gemfile.lock
index 6bafdef..8ad9e4a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -43,7 +43,8 @@ GEM
     erubis (2.7.0)
     globalid (0.3.6)
       activesupport (>= 4.1.0)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     json (1.8.3)
     loofah (2.0.3)
       nokogiri (>= 1.5.9)