diff --git a/Gemfile b/Gemfile
index c5e5c23..65f37d8 100644
--- a/Gemfile
+++ b/Gemfile
@@ -16,7 +16,7 @@ gem 'jquery-rails' # Use jquery as the JavaScript library
 gem 'turbolinks', '~> 5' # Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
 gem 'jbuilder', '~> 2.5' # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 
-gem 'nokogiri', '1.6.7.2'
+gem 'nokogiri', '1.13.5'
 gem 'slim-rails'
 
 gem 'dotenv-rails'
diff --git a/Gemfile.lock b/Gemfile.lock
index 6aad334..b326cc7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -99,15 +99,17 @@ GEM
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
-    mini_portile2 (2.0.0)
+    mini_portile2 (2.8.0)
     minitest (5.10.1)
     mocha (1.2.1)
       metaclass (~> 0.0.1)
     multi_json (1.12.1)
     mysql2 (0.4.5)
     nio4r (2.0.0)
-    nokogiri (1.6.7.2)
-      mini_portile2 (~> 2.0.0.rc2)
+    nokogiri (1.13.5)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
+    racc (1.6.0)
     rack (2.0.2)
     rack-protection (1.5.3)
       rack
@@ -213,7 +215,7 @@ DEPENDENCIES
   minitest
   mocha
   mysql2
-  nokogiri (= 1.6.7.2)
+  nokogiri (= 1.13.5)
   rails (~> 5.1.0)
   redis-namespace
   sass-rails (~> 5.0)