diff --git a/package.json b/package.json
index b5785b2785..2d87730a0e 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "@wordpress/browserslist-config": "4.1.0",
     "autoprefixer": "^10.4.2",
     "eslint": "8.6.0",
-    "postcss": "8.4.5",
+    "postcss": "8.4.12",
     "postcss-import": "14.0.2",
     "postcss-nested": "5.0.6",
     "postcss-preset-env": "7.2.3",
diff --git a/yarn.lock b/yarn.lock
index c4c8ec56d5..1c41b56351 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4794,10 +4794,10 @@ mz@^2.4.0:
     object-assign "^4.0.1"
     thenify-all "^1.0.0"
 
-nanoid@^3.1.30:
-  version "3.1.30"
-  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.1.30.tgz#63f93cc548d2a113dc5dfbc63bfa09e2b9b64362"
-  integrity sha512-zJpuPDwOv8D2zq2WRoMe1HsfZthVewpel9CAvTfc/2mBD1uUT/agc5f7GHGWXlYkFvi1mVxe4IjvP2HNrop7nQ==
+nanoid@^3.3.1:
+  version "3.3.1"
+  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.3.1.tgz#6347a18cac88af88f58af0b3594b723d5e99bb35"
+  integrity sha512-n6Vs/3KGyxPQd6uO0eH4Bv0ojGSUvuLlIHtC3Y0kEO23YRge8H9x1GCzLn28YX0H66pMkxuaeESFq4tKISKwdw==
 
 natural-compare@^1.4.0:
   version "1.4.0"
@@ -5748,14 +5748,14 @@ postcss-value-parser@^4.0.0, postcss-value-parser@^4.0.2, postcss-value-parser@^
     picocolors "^0.2.1"
     source-map "^0.6.1"
 
-postcss@8.4.5, postcss@^8.2.15, postcss@^8.3.11, postcss@^8.3.5:
-  version "8.4.5"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.5.tgz#bae665764dfd4c6fcc24dc0fdf7e7aa00cc77f95"
-  integrity sha512-jBDboWM8qpaqwkMwItqTQTiFikhs/67OYVvblFFTM7MrZjt6yMKd6r2kgXizEbTTljacm4NldIlZnhbjr84QYg==
+postcss@8.4.12, postcss@^8.2.15, postcss@^8.3.11, postcss@^8.3.5:
+  version "8.4.12"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.12.tgz#1e7de78733b28970fa4743f7da6f3763648b1905"
+  integrity sha512-lg6eITwYe9v6Hr5CncVbK70SoioNQIq81nsaG86ev5hAidQvmOeETBqs7jm43K2F5/Ley3ytDtriImV6TpNiSg==
   dependencies:
-    nanoid "^3.1.30"
+    nanoid "^3.3.1"
     picocolors "^1.0.0"
-    source-map-js "^1.0.1"
+    source-map-js "^1.0.2"
 
 prelude-ls@^1.2.1:
   version "1.2.1"
@@ -6381,10 +6381,10 @@ source-list-map@^2.0.1:
   resolved "https://registry.yarnpkg.com/source-list-map/-/source-list-map-2.0.1.tgz#3993bd873bfc48479cca9ea3a547835c7c154b34"
   integrity sha512-qnQ7gVMxGNxsiL4lEuJwe/To8UnK7fAnmbGEEH8RpLouuKbeEm0lhbQVFIrNSuB+G7tVrAlVsZgETT5nljf+Iw==
 
-source-map-js@^1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/source-map-js/-/source-map-js-1.0.1.tgz#a1741c131e3c77d048252adfa24e23b908670caf"
-  integrity sha512-4+TN2b3tqOCd/kaGRJ/sTYA0tR0mdXx26ipdolxcwtJVqEnqNYvlCAt1q3ypy4QMlYus+Zh34RNtYLoq2oQ4IA==
+source-map-js@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/source-map-js/-/source-map-js-1.0.2.tgz#adbc361d9c62df380125e7f161f71c826f1e490c"
+  integrity sha512-R0XvVJ9WusLiqTCEiGCmICCMplcCkIwwR11mOSD9CR5u+IXYdiseeEuXCVAjS54zqwkLcPNnmU4OeJ6tUrWhDw==
 
 source-map-support@~0.5.20:
   version "0.5.21"