diff --git a/api/ruby/building-a-ci-server/Gemfile b/api/ruby/building-a-ci-server/Gemfile
index de581d11f..a92a19a98 100644
--- a/api/ruby/building-a-ci-server/Gemfile
+++ b/api/ruby/building-a-ci-server/Gemfile
@@ -1,6 +1,6 @@
 source "http://rubygems.org"
 
-gem "json",        "~> 1.8"
+gem "json",        "~> 2.3"
 gem 'sinatra',     '~> 1.3.5'
 gem "shotgun"
 gem "octokit",     '~> 3.0'
diff --git a/api/ruby/building-a-ci-server/Gemfile.lock b/api/ruby/building-a-ci-server/Gemfile.lock
index b9af652af..b161fb7dc 100644
--- a/api/ruby/building-a-ci-server/Gemfile.lock
+++ b/api/ruby/building-a-ci-server/Gemfile.lock
@@ -4,7 +4,7 @@ GEM
     addressable (2.3.6)
     faraday (0.9.0)
       multipart-post (>= 1.2, < 3)
-    json (1.8.3)
+    json (2.3.0)
     multipart-post (2.0.0)
     octokit (3.0.0)
       sawyer (~> 0.5.3)
@@ -26,7 +26,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  json (~> 1.8)
+  json (~> 2.3)
   octokit (~> 3.0)
   shotgun
   sinatra (~> 1.3.5)