diff --git a/Gemfile b/Gemfile
index 89dce6c35..24a1266f1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -16,7 +16,7 @@ gem 'bootsnap', '>= 1.1.0', require: false
 gem 'haml'
 gem 'jquery-rails'
 gem 'lograge', '~> 0.11.2'
-gem 'nokogiri', '~> 1.16.5'
+gem 'nokogiri', '~> 1.18.3'
 gem 'pandoc-ruby'
 gem 'sprockets-rails'
 gem 'whenever'
diff --git a/Gemfile.lock b/Gemfile.lock
index 2272703dd..7681f4cc6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -248,7 +248,7 @@ GEM
       net-protocol
     newrelic_rpm (8.2.0)
     nio4r (2.7.4)
-    nokogiri (1.16.8)
+    nokogiri (1.18.3)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
     orm_adapter (0.5.0)
@@ -468,7 +468,7 @@ DEPENDENCIES
   mini_racer
   modernizr-rails
   newrelic_rpm
-  nokogiri (~> 1.16.5)
+  nokogiri (~> 1.18.3)
   pandoc-ruby
   paperclip
   percy-capybara (~> 4.3.2)