diff --git a/Gemfile.lock b/Gemfile.lock
index 68d6ba5..083c88c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -53,6 +53,7 @@ GEM
       activesupport (>= 3.2.0)
       json (>= 1.7)
       mime-types (>= 1.16)
+    concurrent-ruby (1.1.10)
     database_cleaner (1.0.1)
     diff-lcs (1.2.5)
     erubis (2.7.0)
@@ -64,7 +65,8 @@ GEM
       activemodel (>= 4.0.0, < 5)
       activerecord (>= 4.0.0, < 5)
     hike (1.2.3)
-    i18n (0.6.11)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     json (1.8.1)
     mail (2.5.4)
       mime-types (~> 1.16)