diff --git a/api/ruby/rendering-data-as-graphs/Gemfile b/api/ruby/rendering-data-as-graphs/Gemfile
index 9811a87e3..721d752ec 100644
--- a/api/ruby/rendering-data-as-graphs/Gemfile
+++ b/api/ruby/rendering-data-as-graphs/Gemfile
@@ -1,6 +1,6 @@
 source "http://rubygems.org"
 
-gem "json",        "1.7.7"
+gem "json",        "2.3.0"
 gem 'sinatra',     '~> 1.3.5'
 gem 'sinatra_auth_github', '~> 0.13.3'
 gem 'octokit', '~> 1.23.0'
diff --git a/api/ruby/rendering-data-as-graphs/Gemfile.lock b/api/ruby/rendering-data-as-graphs/Gemfile.lock
index dc2bd195e..31cc9f650 100644
--- a/api/ruby/rendering-data-as-graphs/Gemfile.lock
+++ b/api/ruby/rendering-data-as-graphs/Gemfile.lock
@@ -7,7 +7,7 @@ GEM
     faraday_middleware (0.9.0)
       faraday (>= 0.7.4, < 0.9)
     hashie (1.2.0)
-    json (1.7.7)
+    json (2.3.0)
     multi_json (1.6.1)
     multipart-post (1.2.0)
     netrc (0.7.7)
@@ -39,7 +39,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  json (= 1.7.7)
+  json (= 2.3.0)
   octokit (~> 1.23.0)
   sinatra (~> 1.3.5)
   sinatra_auth_github (~> 0.13.3)