diff --git a/package.json b/package.json
index 9218bb2..44bb9f7 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
     "@hotwired/stimulus": "^3.1.0",
     "@hotwired/turbo-rails": "^7.1.3",
     "autoprefixer": "^10.4.8",
-    "postcss": "^8.4.16",
+    "postcss": "^8.4.20",
     "tailwindcss": "^3.1.8",
     "webpack": "^5.74.0",
     "webpack-cli": "^4.10.0"
diff --git a/yarn.lock b/yarn.lock
index 02edff7..4fec280 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -892,10 +892,10 @@ 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@^8.4.14, postcss@^8.4.16:
-  version "8.4.16"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.16.tgz#33a1d675fac39941f5f445db0de4db2b6e01d43c"
-  integrity sha512-ipHE1XBvKzm5xI7hiHCZJCSugxvsdq2mPnsq5+UF+VHCjiBvtDrlxJfMBToWaP9D5XlgNmcFGqoHmUn0EYEaRQ==
+postcss@^8.4.14, postcss@^8.4.20:
+  version "8.4.20"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.20.tgz#64c52f509644cecad8567e949f4081d98349dc56"
+  integrity sha512-6Q04AXR1212bXr5fh03u8aAwbLxAQNGQ/Q1LNa0VfOI06ZAlhPHtQvE4OIdpj4kLThXilalPnmDSOD65DcHt+g==
   dependencies:
     nanoid "^3.3.4"
     picocolors "^1.0.0"