diff --git a/packages/postcss-plugin/package.json b/packages/postcss-plugin/package.json
index 6862f3e5..df1c2e81 100644
--- a/packages/postcss-plugin/package.json
+++ b/packages/postcss-plugin/package.json
@@ -31,9 +31,9 @@
     "postcss-will-change": "^4.0.1"
   },
   "devDependencies": {
-    "postcss": "^8.2.8"
+    "postcss": "^8.4.31"
   },
   "peerDependencies": {
-    "postcss": "^8.2.8"
+    "postcss": "^8.4.31"
   }
 }
diff --git a/packages/stylelint-plugin/package.json b/packages/stylelint-plugin/package.json
index 86007beb..5f7e8ff5 100644
--- a/packages/stylelint-plugin/package.json
+++ b/packages/stylelint-plugin/package.json
@@ -25,7 +25,7 @@
   },
   "homepage": "https://github.com/Shopify/web-configs/blob/main/packages/stylelint-plugin/README.md",
   "dependencies": {
-    "postcss": "^8.4.21",
+    "postcss": "^8.4.31",
     "postcss-scss": "^4.0.6",
     "stylelint-order": "^6.0.3",
     "stylelint-prettier": "^4.0.2",
diff --git a/yarn.lock b/yarn.lock
index 10b2889e..96b22891 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6144,15 +6144,10 @@ mute-stream@0.0.8:
   resolved "https://registry.yarnpkg.com/mute-stream/-/mute-stream-0.0.8.tgz#1630c42b2251ff81e2a283de96a5497ea92e5e0d"
   integrity sha512-nnbWWOkoWyUsTjKrhgD0dcz22mdkSnpYqbEjIm2nhwhuxlSkpywJmBo8h0ZqJdkp73mb90SssHkN4rsRaBAfAA==
 
-nanoid@^3.1.30:
-  version "3.2.0"
-  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.2.0.tgz#62667522da6673971cca916a6d3eff3f415ff80c"
-  integrity sha512-fmsZYa9lpn69Ad5eDn7FMcnnSR+8R34W9qJEijxYhTbfOWzr22n1QxCMzXLK+ODyW2973V3Fux959iQoUxzUIA==
-
-nanoid@^3.3.4:
-  version "3.3.4"
-  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.3.4.tgz#730b67e3cd09e2deacf03c027c81c9d9dbc5e8ab"
-  integrity sha512-MqBkQh/OHTS2egovRtLk45wEyNXwF+cokD+1YPf9u5VfJiRdAiRwB2froX5Co9Rh20xs4siNPm8naNotSD6RBw==
+nanoid@^3.3.6:
+  version "3.3.6"
+  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.3.6.tgz#443380c856d6e9f9824267d960b4236ad583ea4c"
+  integrity sha512-BGcqMMJuToF7i1rt+2PWSNVnWIkGCU78jBG3RxO/bZlnZPK2Cmi2QaffxGO/2RvWi9sL+FAiRiXMgsyxQ1DIDA==
 
 nanomatch@^1.2.9:
   version "1.2.13"
@@ -6849,21 +6844,12 @@ postcss-will-change@^4.0.1:
   resolved "https://registry.yarnpkg.com/postcss-will-change/-/postcss-will-change-4.0.1.tgz#7604320aa8ba147e4d00732a37d32658aeb436d4"
   integrity sha512-nJIHJ+mwWviIPVs/vuUfa/w8XAOXUjfYSIfNgdnZdo9uHC96x4nrY2ByEkdwYLvnxKto09JYDSWH8sWYLoUhUA==
 
-postcss@^8.2.8:
-  version "8.4.4"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.4.tgz#d53d4ec6a75fd62557a66bb41978bf47ff0c2869"
-  integrity sha512-joU6fBsN6EIer28Lj6GDFoC/5yOZzLCfn0zHAn/MYXI7aPt4m4hK5KC5ovEZXy+lnCjmYIbQWngvju2ddyEr8Q==
-  dependencies:
-    nanoid "^3.1.30"
-    picocolors "^1.0.0"
-    source-map-js "^1.0.1"
-
-postcss@^8.4.21:
-  version "8.4.21"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.21.tgz#c639b719a57efc3187b13a1d765675485f4134f4"
-  integrity sha512-tP7u/Sn/dVxK2NnruI4H9BG+x+Wxz6oeZ1cJ8P6G/PZY0IKk4k/63TDsQf2kQq3+qoJeLm2kIBUNlZe3zgb4Zg==
+postcss@^8.4.21, 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 "^3.3.4"
+    nanoid "^3.3.6"
     picocolors "^1.0.0"
     source-map-js "^1.0.2"
 
@@ -7485,12 +7471,7 @@ snapdragon@^0.8.1:
     source-map-resolve "^0.5.0"
     use "^3.1.0"
 
-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:
+source-map-js@^1.0.1, 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==