diff --git a/Gemfile.lock b/Gemfile.lock
index c9a8eea..952932c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,7 +7,7 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    json (1.7.5)
+    json (2.3.1)
     minitest (4.1.0)
     multi_json (1.3.6)
     rack (1.4.1)