diff --git a/Gemfile.lock b/Gemfile.lock
index 0f3fde1..9650c2f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -135,7 +135,8 @@ GEM
       ruby_parser (~> 3.5)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jbuilder (2.4.0)
       activesupport (>= 3.0.0, < 5.1)
       multi_json (~> 1.2)