diff --git a/Gemfile b/Gemfile
index 371f6b3..5fd76c8 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-gem 'nokogiri', '~> 1.11.0'
+gem 'nokogiri', '~> 1.12.5'
 gem 'premailer', '~> 1.11', '>= 1.11.1'
 
 group :test do
diff --git a/Gemfile.lock b/Gemfile.lock
index 9e82e34..358a369 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,10 +6,10 @@ GEM
     css_parser (1.7.1)
       addressable
     htmlentities (4.3.4)
-    mini_portile2 (2.5.0)
+    mini_portile2 (2.6.1)
     minitest (5.14.0)
-    nokogiri (1.11.0)
-      mini_portile2 (~> 2.5.0)
+    nokogiri (1.12.5)
+      mini_portile2 (~> 2.6.1)
       racc (~> 1.4)
     premailer (1.11.1)
       addressable
@@ -24,7 +24,7 @@ PLATFORMS
 
 DEPENDENCIES
   minitest (~> 5.14.0)
-  nokogiri (~> 1.11.0)
+  nokogiri (~> 1.12.5)
   premailer (~> 1.11, >= 1.11.1)
   rake (~> 13.0.1)