diff --git a/Gemfile.lock b/Gemfile.lock
index ecfa27c..eddb05c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -30,10 +30,12 @@ GEM
       multi_json (~> 1.0)
     arel (3.0.3)
     builder (3.0.4)
+    concurrent-ruby (1.1.10)
     erubis (2.7.0)
     execjs (2.6.0)
     hike (1.2.3)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     journey (1.0.4)
     jquery-rails (3.1.4)
       railties (>= 3.0, < 5.0)