diff --git a/Gemfile.lock b/Gemfile.lock
index 911d4d1..2dc747a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -135,7 +135,7 @@ GEM
       thor (>= 0.14, < 2.0)
     jquery-ui-rails (4.0.5)
       railties (>= 3.1.0)
-    json (1.8.0)
+    json (2.3.1)
     kgio (2.9.2)
     libv8 (3.16.14.7)
     listen (1.3.1)