diff --git a/Gemfile.lock b/Gemfile.lock
index 030049d..7a7b3d8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -37,7 +37,8 @@ GEM
     concurrent-ruby (1.0.2)
     erubis (2.7.0)
     fastercsv (1.5.5)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jquery-rails (3.1.4)
       railties (>= 3.0, < 5.0)
       thor (>= 0.14, < 2.0)