diff --git a/Gemfile.lock b/Gemfile.lock
index 791aee3..1545f43 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -41,6 +41,7 @@ GEM
       execjs
     coffee-script-source (1.8.0)
     columnize (0.8.9)
+    concurrent-ruby (1.1.9)
     debugger-linecache (1.2.0)
     domain_name (0.5.21)
       unf (>= 0.0.5, < 1.0.0)
@@ -49,7 +50,8 @@ GEM
     hike (1.2.3)
     http-cookie (1.0.2)
       domain_name (~> 0.5)
-    i18n (0.6.11)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jquery-rails (3.0.4)
       railties (>= 3.0, < 5.0)
       thor (>= 0.14, < 2.0)