diff --git a/package.json b/package.json
index 9268a4b..71eca4b 100644
--- a/package.json
+++ b/package.json
@@ -90,7 +90,7 @@
     },
     "devDependencies": {
         "@tryghost/shared-theme-assets": "2.5.0",
-        "autoprefixer": "10.4.20",
+        "autoprefixer": "10.4.21",
         "beeper": "2.1.0",
         "cssnano": "7.0.6",
         "gscan": "4.47.0",