diff --git a/Gemfile.lock b/Gemfile.lock
index ca228ba..f169e16 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -64,7 +64,8 @@ GEM
     httparty (0.13.7)
       json (~> 1.8)
       multi_xml (>= 0.5.2)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     jbuilder (2.4.1)
       activesupport (>= 3.0.0, < 5.1)
       multi_json (~> 1.2)