diff --git a/Gemfile.lock b/Gemfile.lock
index cd90d7f..00e7e82 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -51,12 +51,14 @@ GEM
     childprocess (0.5.1)
       ffi (~> 1.0, >= 1.0.11)
     coderay (1.1.0)
+    concurrent-ruby (1.1.10)
     database_cleaner (1.2.0)
     diff-lcs (1.2.5)
     erubis (2.7.0)
     ffi (1.9.3)
     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)