diff --git a/Gemfile.lock b/Gemfile.lock
index 7121cd64..9160ba34 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -17,6 +17,7 @@ GEM
       sass (>= 3.3.0, < 3.5)
     compass-import-once (1.0.5)
       sass (>= 3.2, < 3.5)
+    concurrent-ruby (1.1.10)
     diff-lcs (1.3)
     domain_name (0.5.20170404)
       unf (>= 0.0.5, < 1.0.0)
@@ -25,7 +26,8 @@ GEM
     ffi (1.9.10)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
-    i18n (0.7.0)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
     json (2.1.0)
     macaddr (1.7.1)
       systemu (~> 2.6.2)