diff --git a/Gemfile.lock b/Gemfile.lock
index d957f2b..9d71d84 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -39,11 +39,13 @@ GEM
       columnize (~> 0.3)
       debugger-linecache (~> 1.2)
     columnize (0.8.9)
+    concurrent-ruby (1.1.10)
     debugger-linecache (1.2.0)
     erubis (2.7.0)
     execjs (2.0.2)
     hike (1.2.3)
-    i18n (0.6.9)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jquery-rails (3.1.0)
       railties (>= 3.0, < 5.0)
       thor (>= 0.14, < 2.0)