diff --git a/package.json b/package.json
index 2b7402a..c7d0e01 100644
--- a/package.json
+++ b/package.json
@@ -57,7 +57,7 @@
     "css-property-parser": "^1.0.6",
     "gzip-size": "^7.0.0",
     "lodash.isplainobject": "^4.0.6",
-    "postcss": "^6.0.22",
+    "postcss": "^8.0.0",
     "postcss-safe-parser": "^7.0.0",
     "postcss-selector-parser": "^5.0.0-rc.3",
     "postcss-values-parser": "^1.5.0"
diff --git a/yarn.lock b/yarn.lock
index e90fe1b..7c73d18 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1079,7 +1079,7 @@ chalk@^1.0.0, chalk@^1.1.1, chalk@^1.1.3:
     strip-ansi "^3.0.0"
     supports-color "^2.0.0"
 
-chalk@^2.0.0, chalk@^2.0.1, chalk@^2.3.1, chalk@^2.4.1:
+chalk@^2.0.0, chalk@^2.0.1, chalk@^2.3.1:
   version "2.4.1"
   resolved "https://registry.yarnpkg.com/chalk/-/chalk-2.4.1.tgz#18c49ab16a037b6eb0152cc83e3471338215b66e"
   dependencies:
@@ -3637,6 +3637,11 @@ nan@^2.9.2:
   version "2.10.0"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.10.0.tgz#96d0cd610ebd58d4b4de9cc0c6828cda99c7548f"
 
+nanoid@^3.3.11:
+  version "3.3.12"
+  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.3.12.tgz#ab3d912e217a6d0a514f00a72a16543a28982c05"
+  integrity sha512-ZB9RH/39qpq5Vu6Y+NmUaFhQR6pp+M2Xt76XBnEwDaGcVAqhlvxrl3B2bKS5D3NH3QR76v3aSrKaF/Kiy7lEtQ==
+
 nanomatch@^1.2.9:
   version "1.2.13"
   resolved "https://registry.yarnpkg.com/nanomatch/-/nanomatch-1.2.13.tgz#b87a8aa4fc0de8fe6be88895b38983ff265bd119"
@@ -4128,13 +4133,14 @@ postcss-values-parser@^1.5.0:
     indexes-of "^1.0.1"
     uniq "^1.0.1"
 
-postcss@^6.0.22:
-  version "6.0.23"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-6.0.23.tgz#61c82cc328ac60e677645f979054eb98bc0e3324"
+postcss@^8.0.0:
+  version "8.5.14"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.5.14.tgz#a66c2d7808fadf69ebb5b84a03f8bafd76c4919c"
+  integrity sha512-SoSL4+OSEtR99LHFZQiJLkT59C5B1amGO1NzTwj7TT1qCUgUO6hxOvzkOYxD+vMrXBM3XJIKzokoERdqQq/Zmg==
   dependencies:
-    chalk "^2.4.1"
-    source-map "^0.6.1"
-    supports-color "^5.4.0"
+    nanoid "^3.3.11"
+    picocolors "^1.1.1"
+    source-map-js "^1.2.1"
 
 pre-commit@^1.2.2:
   version "1.2.2"
@@ -4739,6 +4745,11 @@ sntp@0.2.x:
   dependencies:
     hoek "0.9.x"
 
+source-map-js@^1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/source-map-js/-/source-map-js-1.2.1.tgz#1ce5650fddd87abc099eda37dcff024c2667ae46"
+  integrity sha512-UXWMKhLOwVKb728IUtQPXxfYU+usdybtUrK/8uGE8CQMvrhOpwvzDBwj0QhSL7MQc7vIsISBG8VQ8+IDQxpfQA==
+
 source-map-resolve@^0.5.0:
   version "0.5.2"
   resolved "https://registry.yarnpkg.com/source-map-resolve/-/source-map-resolve-0.5.2.tgz#72e2cc34095543e43b2c62b2c4c10d4a9054f259"
@@ -4776,7 +4787,7 @@ source-map@^0.5.0, source-map@^0.5.3, source-map@^0.5.6, source-map@^0.5.7, sour
   version "0.5.7"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.7.tgz#8a039d2d1021d22d1ea14c80d8ea468ba2ef3fcc"
 
-source-map@^0.6.0, source-map@^0.6.1, source-map@~0.6.1:
+source-map@^0.6.0, source-map@~0.6.1:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
 
@@ -4971,7 +4982,7 @@ supports-color@^3.1.0, supports-color@^3.1.2:
   dependencies:
     has-flag "^1.0.0"
 
-supports-color@^5.3.0, supports-color@^5.4.0:
+supports-color@^5.3.0:
   version "5.5.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-5.5.0.tgz#e2e69a44ac8772f78a1ec0b35b689df6530efc8f"
   dependencies: