diff --git a/Gemfile.lock b/Gemfile.lock
index 2ebbe5e5..75ea6bad 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -123,6 +123,7 @@ GEM
       compass (~> 1.0.0)
       sass-rails (<= 5.0.1)
       sprockets (< 2.13)
+    concurrent-ruby (1.1.10)
     connection_pool (2.2.0)
     crack (0.4.2)
       safe_yaml (~> 1.0.0)
@@ -321,7 +322,8 @@ GEM
       domain_name (~> 0.5)
     http_parser.rb (0.6.0)
     httpauth (0.2.1)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     inflecto (0.0.2)
     ipaddress (0.8.0)
     jbuilder (2.3.1)