diff --git a/Gemfile b/Gemfile
index 91cadced523..2de8ab20e1d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,6 +9,7 @@ source "https://rubygems.org"
 # This will help ensure the proper Jekyll version is running.
 # Happy Jekylling!
 gem "jekyll", "~> 3.6.2"
+gem "json"
 
 # This is the default theme for new Jekyll sites. You may change this to anything you like.
 # gem "minima", "~> 2.0"