diff --git a/.changeset/tiny-jobs-grow.md b/.changeset/tiny-jobs-grow.md
new file mode 100644
index 000000000..616988383
--- /dev/null
+++ b/.changeset/tiny-jobs-grow.md
@@ -0,0 +1,5 @@
+---
+"modular-scripts": patch
+---
+
+Bump postcss from 8.4.4 to 8.4.5
diff --git a/packages/modular-scripts/package.json b/packages/modular-scripts/package.json
index af0af74da..c89fc9810 100644
--- a/packages/modular-scripts/package.json
+++ b/packages/modular-scripts/package.json
@@ -85,7 +85,7 @@
     "parse5": "6.0.1",
     "pkg-up": "3.1.0",
     "pnp-webpack-plugin": "1.6.4",
-    "postcss": "8.4.4",
+    "postcss": "8.4.5",
     "postcss-flexbugs-fixes": "4.2.1",
     "postcss-loader": "4.2.0",
     "postcss-normalize": "8.0.1",
diff --git a/yarn.lock b/yarn.lock
index 4dfb7b408..16ff226b5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -10879,10 +10879,10 @@ 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@8.4.4, postcss@^8.1.0, postcss@^8.2.1, postcss@^8.2.14:
-  version "8.4.4"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.4.tgz#d53d4ec6a75fd62557a66bb41978bf47ff0c2869"
-  integrity sha512-joU6fBsN6EIer28Lj6GDFoC/5yOZzLCfn0zHAn/MYXI7aPt4m4hK5KC5ovEZXy+lnCjmYIbQWngvju2ddyEr8Q==
+postcss@8.4.5, postcss@^8.1.0, postcss@^8.2.1, postcss@^8.2.14, postcss@^8.3:
+  version "8.4.5"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.5.tgz#bae665764dfd4c6fcc24dc0fdf7e7aa00cc77f95"
+  integrity sha512-jBDboWM8qpaqwkMwItqTQTiFikhs/67OYVvblFFTM7MrZjt6yMKd6r2kgXizEbTTljacm4NldIlZnhbjr84QYg==
   dependencies:
     nanoid "^3.1.30"
     picocolors "^1.0.0"