diff --git a/package.json b/package.json
index 4e73089..389af59 100644
--- a/package.json
+++ b/package.json
@@ -63,7 +63,7 @@
     "jest": "28.0.3",
     "lefthook": "1.1.1",
     "markdown-link-check": "^3.10.0",
-    "postcss": "8.4.12",
+    "postcss": "8.4.21",
     "prettier": "2.6.2",
     "sass": "1.50.1",
     "stylelint": "14.7.1",
diff --git a/yarn.lock b/yarn.lock
index cbce589..91abf92 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7025,7 +7025,7 @@ ms@^2.1.3:
   resolved "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz"
   integrity sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA==
 
-nanoid@^3.1.30, nanoid@^3.3.1:
+nanoid@^3.1.30, nanoid@^3.3.4:
   version "3.3.4"
   resolved "https://registry.npmjs.org/nanoid/-/nanoid-3.3.4.tgz"
   integrity sha512-MqBkQh/OHTS2egovRtLk45wEyNXwF+cokD+1YPf9u5VfJiRdAiRwB2froX5Co9Rh20xs4siNPm8naNotSD6RBw==
@@ -7518,12 +7518,12 @@ postcss-value-parser@^4.1.0, postcss-value-parser@^4.2.0:
   resolved "https://registry.npmjs.org/postcss-value-parser/-/postcss-value-parser-4.2.0.tgz"
   integrity sha512-1NNCs6uurfkVbeXG4S8JFT9t19m45ICnif8zWLd5oPSZ50QnwMfK+H3jv408d4jw/7Bttv5axS5IiHoLaVNHeQ==
 
-postcss@8.4.12, postcss@^8.3.11, postcss@^8.4.12:
-  version "8.4.12"
-  resolved "https://registry.npmjs.org/postcss/-/postcss-8.4.12.tgz"
-  integrity sha512-lg6eITwYe9v6Hr5CncVbK70SoioNQIq81nsaG86ev5hAidQvmOeETBqs7jm43K2F5/Ley3ytDtriImV6TpNiSg==
+postcss@8.4.21, postcss@^8.3.11, postcss@^8.4.12:
+  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==
   dependencies:
-    nanoid "^3.3.1"
+    nanoid "^3.3.4"
     picocolors "^1.0.0"
     source-map-js "^1.0.2"