diff --git a/Gemfile.lock b/Gemfile.lock
index ba5aef4..502f756 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -44,7 +44,7 @@ GEM
       uber (~> 0.0.14)
     http_parser.rb (0.6.0)
     i18n (0.7.0)
-    json (2.2.0)
+    json (2.3.1)
     kramdown (1.17.0)
     libv8 (7.3.492.27.1)
     listen (3.0.8)