diff --git a/Gemfile.lock b/Gemfile.lock
index 9a73688..0b419cf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -66,6 +66,7 @@ GEM
       execjs
     coffee-script-source (1.9.1.1)
     columnize (0.9.0)
+    concurrent-ruby (1.1.10)
     debug_inspector (0.0.2)
     diff-lcs (1.2.5)
     erubis (2.7.0)
@@ -97,7 +98,8 @@ GEM
       rspec (>= 2.99.0, < 4.0)
     haml (4.0.7)
       tilt
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jbuilder (2.3.1)
       activesupport (>= 3.0.0, < 5)
       multi_json (~> 1.2)