diff --git a/Gemfile b/Gemfile
index 8f13b1f88d5..8ac3e33d9ff 100644
--- a/Gemfile
+++ b/Gemfile
@@ -151,7 +151,7 @@ group :production do
   gem 'unicorn-worker-killer', require: false
 end
 
-gem 'autoprefixer-rails', '~> 7.1.5'
+gem 'autoprefixer-rails', '~> 9.4.5'
 gem 'bourbon', '~> 4.3.4'
 gem 'i18n-js', '~> 3.0.0'
 gem 'sass', '3.5.1'
diff --git a/Gemfile.lock b/Gemfile.lock
index 80378d0c77c..3867bdc3144 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -258,7 +258,7 @@ GEM
     arel (9.0.0)
     ast (2.4.0)
     attr_required (1.0.1)
-    autoprefixer-rails (7.1.5)
+    autoprefixer-rails (9.4.5)
       execjs
     awesome_nested_set (3.1.4)
       activerecord (>= 4.0.0, < 5.3)
@@ -847,7 +847,7 @@ DEPENDENCIES
   acts_as_tree (~> 2.8.0)
   addressable (~> 2.5.2)
   airbrake (~> 7.4.0)
-  autoprefixer-rails (~> 7.1.5)
+  autoprefixer-rails (~> 9.4.5)
   awesome_nested_set (~> 3.1.3)
   aws-sdk-core (~> 3.20.2)
   aws-sdk-s3 (~> 1.9.1)