diff --git a/Gemfile.lock b/Gemfile.lock
index 7299398..6e62462 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -29,7 +29,8 @@ GEM
       ffi (>= 1.0.0)
       rake
     hashdiff (0.3.0)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     method_source (0.8.2)
     minitest (5.9.0)
     pry (0.10.1)