diff --git a/Gemfile.lock b/Gemfile.lock
index 352171b..9c98a57 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    json (1.8.3)
+    json (2.3.0)
     minitest (5.8.4)
     rake (12.3.3)