diff --git a/Gemfile.lock b/Gemfile.lock
index 3606f2f..0553169 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -42,6 +42,7 @@ 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)
     dino (0.11.2)
@@ -60,7 +61,8 @@ GEM
       json (~> 1.8)
       multi_xml (>= 0.5.2)
     httpclient (2.5.3.2)
-    i18n (0.6.11)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jbuilder (2.2.4)
       activesupport (>= 3.0.0, < 5)
       multi_json (~> 1.2)