diff --git a/Gemfile.lock b/Gemfile.lock
index 4669c29..4505b9d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -46,6 +46,7 @@ GEM
       execjs
     coffee-script-source (1.8.0)
     columnize (0.8.9)
+    concurrent-ruby (1.1.10)
     debugger-linecache (1.2.0)
     diff-lcs (1.2.5)
     dotenv (1.0.2)
@@ -54,7 +55,8 @@ GEM
     erubis (2.7.0)
     execjs (2.2.2)
     hike (1.2.3)
-    i18n (0.6.11)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jbuilder (2.2.3)
       activesupport (>= 3.0.0, < 5)
       multi_json (~> 1.2)