diff --git a/Gemfile b/Gemfile
index 8e4729fc7..c1439212e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,7 +3,7 @@ source 'https://rubygems.org'
 gem 'octokit', '~> 3.3.1'
 gem 'faraday', '~> 0.9.0'
 gem 'httpclient', '~> 2.4.0'
-gem 'nokogiri', '~> 1.6.3.1'
+gem 'nokogiri', '~> 1.11.4'
 gem 'git', '~> 1.2.8'
 gem 'parallel', '~> 1.2.4'
 gem 'puma', '~> 2.9.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index 838a9cf13..fe813055f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,16 +8,18 @@ GEM
     git (1.2.8)
     httpclient (2.4.0)
     i18n (0.7.0)
-    mini_portile (0.6.0)
+    mini_portile2 (2.5.1)
     multi_json (1.10.1)
     multipart-post (2.0.0)
-    nokogiri (1.6.3.1)
-      mini_portile (= 0.6.0)
+    nokogiri (1.11.4)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
     octokit (3.3.1)
       sawyer (~> 0.5.3)
     parallel (1.2.4)
     puma (2.9.0)
       rack (>= 1.1, < 2.0)
+    racc (1.5.2)
     rack (1.5.2)
     rack-protection (1.5.3)
       rack
@@ -47,7 +49,7 @@ DEPENDENCIES
   git (~> 1.2.8)
   httpclient (~> 2.4.0)
   i18n (~> 0.7.0)
-  nokogiri (~> 1.6.3.1)
+  nokogiri (~> 1.11.4)
   octokit (~> 3.3.1)
   parallel (~> 1.2.4)
   puma (~> 2.9.0)