diff --git a/Gemfile b/Gemfile
index 29ec34da2..44b4cfe1b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ gem 'acts-as-taggable-on', '~> 5.0.0'
 gem 'acts_as_votable', '~> 0.11.1'
 gem 'ahoy_matey', '~> 1.6.0'
 gem 'ancestry', '~> 3.0.1'
-gem 'autoprefixer-rails', '~> 8.2.0'
+gem 'autoprefixer-rails', '~> 9.1.4'
 gem 'browser', '~> 2.5.2'
 gem 'cancancan', '~> 2.1.2'
 gem 'ckeditor', '~> 4.2.3'
diff --git a/Gemfile.lock b/Gemfile.lock
index 83c4d14af..50c371d4f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -61,7 +61,7 @@ GEM
       activerecord (>= 3.2.0)
     arel (6.0.4)
     ast (2.4.0)
-    autoprefixer-rails (8.2.0)
+    autoprefixer-rails (9.1.4)
       execjs
     babel-source (5.8.35)
     babel-transpiler (0.7.0)
@@ -502,7 +502,7 @@ DEPENDENCIES
   acts_as_votable (~> 0.11.1)
   ahoy_matey (~> 1.6.0)
   ancestry (~> 3.0.1)
-  autoprefixer-rails (~> 8.2.0)
+  autoprefixer-rails (~> 9.1.4)
   browser (~> 2.5.2)
   bullet (~> 5.7.0)
   byebug (~> 10.0.0)