diff --git a/Gemfile.lock b/Gemfile.lock
index e48fff7..26cf265 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -31,7 +31,8 @@ GEM
     builder (3.2.2)
     concurrent-ruby (1.0.2)
     erubis (2.7.0)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     json (1.8.3)
     mail (2.5.4)
       mime-types (~> 1.16)