diff --git a/Gemfile.lock b/Gemfile.lock
index eccb2d8..126cc30 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -54,6 +54,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.7.0)
+    concurrent-ruby (1.1.10)
     debug_inspector (0.0.2)
     diff-lcs (1.2.5)
     docile (1.1.3)
@@ -83,7 +84,8 @@ GEM
     hike (1.2.3)
     hitimes (1.2.2)
     http_parser.rb (0.6.0)
-    i18n (0.6.9)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jbuilder (2.0.7)
       activesupport (>= 3.0.0, < 5)
       multi_json (~> 1.2)