diff --git a/Gemfile.lock b/Gemfile.lock
index 6e1e7c7..6b48c96 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -60,7 +60,7 @@ GEM
     i18n (0.9.1)
       concurrent-ruby (~> 1.0)
     ice_nine (0.11.2)
-    json (2.1.0)
+    json (2.3.1)
     launchy (2.4.3)
       addressable (~> 2.3)
     mago (0.1.0)