diff --git a/Gemfile.lock b/Gemfile.lock
index 9d480ed..036d55a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -46,6 +46,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.9.1)
+    concurrent-ruby (1.1.10)
     database_cleaner (1.4.1)
     diff-lcs (1.2.5)
     erubis (2.7.0)
@@ -71,7 +72,8 @@ GEM
       rspec (>= 2.99.0, < 4.0)
     hike (1.2.3)
     hitimes (1.2.2)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jquery-rails (3.1.2)
       railties (>= 3.0, < 5.0)
       thor (>= 0.14, < 2.0)