diff --git a/Gemfile.lock b/Gemfile.lock
index b1c5548..b248d84 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -70,6 +70,7 @@ GEM
       execjs
     coffee-script-source (1.7.1)
     colored (1.2)
+    concurrent-ruby (1.1.10)
     crack (0.4.2)
       safe_yaml (~> 1.0.0)
     cucumber (1.3.15)
@@ -107,7 +108,8 @@ 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 (2.3.0)
       railties (>= 3.0, < 5.0)
       thor (>= 0.14, < 2.0)