diff --git a/package.json b/package.json
index 1303cf22..1327c882 100644
--- a/package.json
+++ b/package.json
@@ -42,7 +42,7 @@
     "contributors": "https://github.com/TryGhost/Source/graphs/contributors",
     "devDependencies": {
         "@tryghost/release-utils": "0.8.1",
-        "autoprefixer": "10.4.24",
+        "autoprefixer": "10.4.27",
         "beeper": "2.1.0",
         "cssnano": "7.1.2",
         "gscan": "5.2.4",
@@ -53,7 +53,7 @@
         "gulp-uglify": "3.0.2",
         "gulp-zip": "6.1.0",
         "inquirer": "13.2.2",
-        "postcss": "8.5.6",
+        "postcss": "8.5.8",
         "postcss-easy-import": "4.0.0",
         "pump": "3.0.3"
     },
diff --git a/yarn.lock b/yarn.lock
index 1e88481b..5125f7c2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2278,13 +2278,13 @@ asynckit@^0.4.0:
   resolved "https://registry.yarnpkg.com/asynckit/-/asynckit-0.4.0.tgz#c79ed97f7f34cb8f2ba1bc9790bcc366474b4b79"
   integrity sha512-Oei9OH4tRh0YqU3GxhX79dM/mwVgvbZJaSNaRk+bshkj0S5cfHcgYakreBjrHwatXKbz+IoIdYLxrKim2MjW0Q==
 
-autoprefixer@10.4.24:
-  version "10.4.24"
-  resolved "https://registry.yarnpkg.com/autoprefixer/-/autoprefixer-10.4.24.tgz#2c29595f3abd820a79976a609d0bf40eecf212fb"
-  integrity sha512-uHZg7N9ULTVbutaIsDRoUkoS8/h3bdsmVJYZ5l3wv8Cp/6UIIoRDm90hZ+BwxUj/hGBEzLxdHNSKuFpn8WOyZw==
+autoprefixer@10.4.27:
+  version "10.4.27"
+  resolved "https://registry.yarnpkg.com/autoprefixer/-/autoprefixer-10.4.27.tgz#51ea301a5c3c5f8642f8e564759c4f573be486f2"
+  integrity sha512-NP9APE+tO+LuJGn7/9+cohklunJsXWiaWEfV3si4Gi/XHDwVNgkwr1J3RQYFIvPy76GmJ9/bW8vyoU1LcxwKHA==
   dependencies:
     browserslist "^4.28.1"
-    caniuse-lite "^1.0.30001766"
+    caniuse-lite "^1.0.30001774"
     fraction.js "^5.3.4"
     picocolors "^1.1.1"
     postcss-value-parser "^4.2.0"
@@ -2556,10 +2556,10 @@ caniuse-api@^3.0.0:
     lodash.memoize "^4.1.2"
     lodash.uniq "^4.5.0"
 
-caniuse-lite@^1.0.0, caniuse-lite@^1.0.30001759, caniuse-lite@^1.0.30001766:
-  version "1.0.30001766"
-  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001766.tgz#b6f6b55cb25a2d888d9393104d14751c6a7d6f7a"
-  integrity sha512-4C0lfJ0/YPjJQHagaE9x2Elb69CIqEPZeG0anQt9SIvIoOH4a4uaRl73IavyO+0qZh6MDLH//DrXThEYKHkmYA==
+caniuse-lite@^1.0.0, caniuse-lite@^1.0.30001759, caniuse-lite@^1.0.30001774:
+  version "1.0.30001776"
+  resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30001776.tgz#3c64d006348a2e92037aa4302345129806a42d24"
+  integrity sha512-sg01JDPzZ9jGshqKSckOQthXnYwOEP50jeVFhaSFbZcOy05TiuuaffDOfcwtCisJ9kNQuLBFibYywv2Bgm9osw==
 
 caseless@~0.12.0:
   version "0.12.0"
@@ -5095,10 +5095,10 @@ postcss-value-parser@^4.0.0, postcss-value-parser@^4.2.0:
   resolved "https://registry.yarnpkg.com/postcss-value-parser/-/postcss-value-parser-4.2.0.tgz#723c09920836ba6d3e5af019f92bc0971c02e514"
   integrity sha512-1NNCs6uurfkVbeXG4S8JFT9t19m45ICnif8zWLd5oPSZ50QnwMfK+H3jv408d4jw/7Bttv5axS5IiHoLaVNHeQ==
 
-postcss@8.5.6:
-  version "8.5.6"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.5.6.tgz#2825006615a619b4f62a9e7426cc120b349a8f3c"
-  integrity sha512-3Ybi1tAuwAP9s0r1UQ2J4n5Y0G05bJkpUIO0/bI9MhwmD70S5aTWbXGBwxHrelT+XM1k6dM0pk+SwNkpTRN7Pg==
+postcss@8.5.8:
+  version "8.5.8"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.5.8.tgz#6230ecc8fb02e7a0f6982e53990937857e13f399"
+  integrity sha512-OW/rX8O/jXnm82Ey1k44pObPtdblfiuWnrd8X7GJ7emImCOstunGbXUpp7HdBrFQX6rJzn3sPT397Wp5aCwCHg==
   dependencies:
     nanoid "^3.3.11"
     picocolors "^1.1.1"