diff --git a/Gemfile.lock b/Gemfile.lock
index bfeefd3..802927e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -18,7 +18,8 @@ GEM
     hashdiff (0.3.1)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     mime-types (1.25.1)
     mini_portile2 (2.4.0)
     minitest (5.10.1)