diff --git a/Gemfile.lock b/Gemfile.lock
index 7d0ba0a..a65fa02 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -36,9 +36,11 @@ GEM
       multi_json (~> 1.0)
     arel (3.0.2)
     builder (3.0.0)
+    concurrent-ruby (1.1.5)
     erubis (2.7.0)
     hike (1.2.1)
-    i18n (0.6.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     journey (1.0.4)
     jquery-rails (2.0.2)
       railties (>= 3.2.0, < 5.0)