diff --git a/package.json b/package.json
index 57f7dbd215..929cc48835 100644
--- a/package.json
+++ b/package.json
@@ -170,16 +170,16 @@
         "jest-raw-loader": "^1.0.1",
         "matrix-mock-request": "^2.5.0",
         "matrix-web-i18n": "^3.2.1",
-        "mini-css-extract-plugin": "^2.7.6",
+        "mini-css-extract-plugin": "2.8.0",
         "minimist": "^1.2.6",
         "mkdirp": "^3.0.0",
         "modernizr": "^3.12.0",
         "node-fetch": "^2.6.7",
-        "postcss": "8.4.35",
+        "postcss": "8.4.33",
         "postcss-easings": "^2.0.0",
         "postcss-hexrgba": "2.0.1",
-        "postcss-import": "16.0.1",
-        "postcss-loader": "^8.1.0",
+        "postcss-import": "16.0.0",
+        "postcss-loader": "8.1.0",
         "postcss-mixins": "^6.2.3",
         "postcss-nested": "^4.2.3",
         "postcss-preset-env": "^9.3.0",
diff --git a/yarn.lock b/yarn.lock
index 7cbc73bff8..64ab1500ec 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8843,10 +8843,10 @@ min-indent@^1.0.0:
   resolved "https://registry.yarnpkg.com/min-indent/-/min-indent-1.0.1.tgz#a63f681673b30571fbe8bc25686ae746eefa9869"
   integrity sha512-I9jwMn07Sy/IwOj3zVkVik2JTvgpaykDZEigL6Rx6N9LbMywwUSMtxET+7lVoDLLd3O3IXwJwvuuns8UB/HeAg==
 
-mini-css-extract-plugin@^2.7.6:
-  version "2.8.1"
-  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-2.8.1.tgz#75245f3f30ce3a56dbdd478084df6fe475f02dc7"
-  integrity sha512-/1HDlyFRxWIZPI1ZpgqlZ8jMw/1Dp/dl3P0L1jtZ+zVcHqwPhGwaJwKL00WVgfnBy6PWCde9W65or7IIETImuA==
+mini-css-extract-plugin@2.8.0:
+  version "2.8.0"
+  resolved "https://registry.yarnpkg.com/mini-css-extract-plugin/-/mini-css-extract-plugin-2.8.0.tgz#1aeae2a90a954b6426c9e8311eab36b450f553a0"
+  integrity sha512-CxmUYPFcTgET1zImteG/LZOy/4T5rTojesQXkSNBiquhydn78tfbCE9sjIjnJ/UcjNjOC1bphTCCW5rrS7cXAg==
   dependencies:
     schema-utils "^4.0.0"
     tapable "^2.2.1"
@@ -9756,10 +9756,10 @@ postcss-image-set-function@^6.0.3:
     "@csstools/utilities" "^1.0.0"
     postcss-value-parser "^4.2.0"
 
-postcss-import@16.0.1:
-  version "16.0.1"
-  resolved "https://registry.yarnpkg.com/postcss-import/-/postcss-import-16.0.1.tgz#c2e0478c5af8cb39ab3964c35d8fee8e70c362b8"
-  integrity sha512-i2Pci0310NaLHr/5JUFSw1j/8hf1CzwMY13g6ZDxgOavmRHQi2ba3PmUHoihO+sjaum+KmCNzskNsw7JDrg03g==
+postcss-import@16.0.0:
+  version "16.0.0"
+  resolved "https://registry.yarnpkg.com/postcss-import/-/postcss-import-16.0.0.tgz#2be1c78391b3f43f129fccfe5cc0cc1a11baef54"
+  integrity sha512-e77lhVvrD1I2y7dYmBv0k9ULTdArgEYZt97T4w6sFIU5uxIHvDFQlKgUUyY7v7Barj0Yf/zm5A4OquZN7jKm5Q==
   dependencies:
     postcss-value-parser "^4.0.0"
     read-cache "^1.0.0"
@@ -9784,10 +9784,10 @@ postcss-lab-function@^6.0.10:
     "@csstools/postcss-progressive-custom-properties" "^3.1.0"
     "@csstools/utilities" "^1.0.0"
 
-postcss-loader@^8.1.0:
-  version "8.1.1"
-  resolved "https://registry.yarnpkg.com/postcss-loader/-/postcss-loader-8.1.1.tgz#2822589e7522927344954acb55bbf26e8b195dfe"
-  integrity sha512-0IeqyAsG6tYiDRCYKQJLAmgQr47DX6N7sFSWvQxt6AcupX8DIdmykuk/o/tx0Lze3ErGHJEp5OSRxrelC6+NdQ==
+postcss-loader@8.1.0:
+  version "8.1.0"
+  resolved "https://registry.yarnpkg.com/postcss-loader/-/postcss-loader-8.1.0.tgz#590e8bd872d7cdf53c486cbcd40c4c94789f1216"
+  integrity sha512-AbperNcX3rlob7Ay7A/HQcrofug1caABBkopoFeOQMspZBqcqj6giYn1Bwey/0uiOPAcR+NQD0I2HC7rXzk91w==
   dependencies:
     cosmiconfig "^9.0.0"
     jiti "^1.20.0"
@@ -10172,10 +10172,10 @@ postcss-value-parser@^4.0.0, 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@8.4.35, postcss@^8.3.11, postcss@^8.4.33:
-  version "8.4.35"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.35.tgz#60997775689ce09011edf083a549cea44aabe2f7"
-  integrity sha512-u5U8qYpBCpN13BsiEB0CbR1Hhh4Gc0zLFuedrHJKMctHCHAGrMdG0PRM/KErzAL3CU6/eckEtmHNB3x6e3c0vA==
+postcss@8.4.33:
+  version "8.4.33"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.4.33.tgz#1378e859c9f69bf6f638b990a0212f43e2aaa742"
+  integrity sha512-Kkpbhhdjw2qQs2O2DGX+8m5OVqEcbB9HRBvuYM9pgrjEFUg30A9LmXNlTAUj4S9kgtGyrMbTzVjH7E+s5Re2yg==
   dependencies:
     nanoid "^3.3.7"
     picocolors "^1.0.0"
@@ -10189,6 +10189,15 @@ postcss@^7.0.14, postcss@^7.0.18, postcss@^7.0.2, postcss@^7.0.21, postcss@^7.0.
     picocolors "^0.2.1"
     source-map "^0.6.1"
 
+postcss@^8.3.11, postcss@^8.4.33:
+  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"
+
 posthog-js@1.106.0:
   version "1.106.0"
   resolved "https://registry.yarnpkg.com/posthog-js/-/posthog-js-1.106.0.tgz#d107d1a0b252f337b6fe552c5755a4df4e1e8493"