diff --git a/package.json b/package.json
index 57ff878bbfd1..3b1c977c0d03 100644
--- a/package.json
+++ b/package.json
@@ -427,7 +427,7 @@
     "nyc": "^15.1.0",
     "pixelmatch": "^5.1.0",
     "pngjs": "^3.4.0",
-    "postcss": "^8.4.5",
+    "postcss": "^8.4.31",
     "prettier": "^2.1.1",
     "prop-types": "^15.7.2",
     "react": "^16.14.0",
diff --git a/packages/osd-optimizer/package.json b/packages/osd-optimizer/package.json
index e0410c441c38..40b06b938073 100644
--- a/packages/osd-optimizer/package.json
+++ b/packages/osd-optimizer/package.json
@@ -31,7 +31,7 @@
     "lmdb": "^2.8.0",
     "normalize-path": "^3.0.0",
     "pirates": "^4.0.1",
-    "postcss": "^8.4.5",
+    "postcss": "^8.4.31",
     "rxjs": "^6.5.5",
     "source-map-support": "^0.5.19",
     "terser-webpack-plugin": "^2.1.2",
diff --git a/packages/osd-ui-framework/package.json b/packages/osd-ui-framework/package.json
index 156ccbbdfcd6..e21caefe4cbc 100644
--- a/packages/osd-ui-framework/package.json
+++ b/packages/osd-ui-framework/package.json
@@ -33,7 +33,7 @@
     "grunt-contrib-copy": "^1.0.0",
     "node-sass": "npm:@amoo-miki/node-sass@9.0.0-libsass-3.6.5",
     "sass-loader": "npm:@amoo-miki/sass-loader@10.4.1-node-sass-9.0.0-libsass-3.6.5",
-    "postcss": "^8.4.5",
+    "postcss": "^8.4.31",
     "sinon": "^7.4.2"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 2e559de43b77..9aca11830380 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -13007,10 +13007,10 @@ nanoid@3.3.3:
   resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.3.3.tgz#fd8e8b7aa761fe807dba2d1b98fb7241bb724a25"
   integrity sha512-p1sjXuopFs0xg+fPASzQ28agW1oHD7xDsd9Xkf3T15H3c/cifrFHVwrh74PdoklAPi+i7MdRsE47vm2r6JoB+w==
 
-nanoid@^3.3.1:
-  version "3.3.2"
-  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.3.2.tgz#c89622fafb4381cd221421c69ec58547a1eec557"
-  integrity sha512-CuHBogktKwpm5g2sRgv83jEy2ijFzBwMoYA60orPDR7ynsLijJDqgsi4RDGj3OJpy3Ieb+LYwiRmIOGyytgITA==
+nanoid@^3.3.6, nanoid@^3.3.7:
+  version "3.3.7"
+  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.3.7.tgz#d0c301a691bc8d54efa0a2226ccf3fe2fd656bd8"
+  integrity sha512-eSRppjcPIatRIMC1U6UngP8XFcz8MQWGQdt1MTBQ7NaAmvXDfvNxbvWV3x2y6CdEUciCSsDHDQZbhYaB8QEo2g==
 
 nanomatch@^1.2.9:
   version "1.2.13"
@@ -14241,12 +14241,21 @@ postcss-value-parser@^4.0.2, postcss-value-parser@^4.1.0, postcss-value-parser@^
   resolved "https://registry.yarnpkg.com/postcss-value-parser/-/postcss-value-parser-4.2.0.tgz#723c09920836ba6d3e5af019f92bc0971c02e514"
   integrity sha512-1NNCs6uurfkVbeXG4S8JFT9t19m45ICnif8zWLd5oPSZ50QnwMfK+H3jv408d4jw/7Bttv5axS5IiHoLaVNHeQ==
 
-postcss@^8.2.15, postcss@^8.4.12, postcss@^8.4.5:
-  version "8.4.12"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.12.tgz#1e7de78733b28970fa4743f7da6f3763648b1905"
-  integrity sha512-lg6eITwYe9v6Hr5CncVbK70SoioNQIq81nsaG86ev5hAidQvmOeETBqs7jm43K2F5/Ley3ytDtriImV6TpNiSg==
+postcss@^8.2.15, postcss@^8.4.12:
+  version "8.4.35"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.35.tgz#60997775689ce09011edf083a549cea44aabe2f7"
+  integrity sha512-u5U8qYpBCpN13BsiEB0CbR1Hhh4Gc0zLFuedrHJKMctHCHAGrMdG0PRM/KErzAL3CU6/eckEtmHNB3x6e3c0vA==
+  dependencies:
+    nanoid "^3.3.7"
+    picocolors "^1.0.0"
+    source-map-js "^1.0.2"
+
+postcss@^8.4.31:
+  version "8.4.31"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.31.tgz#92b451050a9f914da6755af352bdc0192508656d"
+  integrity sha512-PS08Iboia9mts/2ygV3eLpY5ghnUcfLV/EXTOW1E2qYxJKGGBUtNjN76FYHnMs36RmARn41bC0AZmn+rR0OVpQ==
   dependencies:
-    nanoid "^3.3.1"
+    nanoid "^3.3.6"
     picocolors "^1.0.0"
     source-map-js "^1.0.2"