diff --git a/Gemfile.lock b/Gemfile.lock
index e95adde..28962b1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -22,6 +22,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.7.1)
+    concurrent-ruby (1.1.9)
     diff-lcs (1.2.5)
     dotenv (0.7.0)
     execjs (2.2.1)
@@ -38,7 +39,8 @@ GEM
       sprockets (>= 2.0.3)
       tilt
     hike (1.2.3)
-    i18n (0.6.9)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     json (1.8.1)
     libv8 (3.16.14.7)
     method_source (0.8.2)