diff --git a/Gemfile.lock b/Gemfile.lock
index b4641b0..5b6df09 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -55,7 +55,8 @@ GEM
     ffi (1.9.14)
     globalid (0.3.7)
       activesupport (>= 4.1.0)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jbuilder (2.6.0)
       activesupport (>= 3.0.0, < 5.1)
       multi_json (~> 1.2)