diff --git a/package.json b/package.json
index 25cc560d4785..6dd10cbe13ee 100644
--- a/package.json
+++ b/package.json
@@ -90,7 +90,7 @@
     "@stripe/stripe-js": "^5.4.0",
     "@use-it/interval": "^1.0.0",
     "@vscode/ripgrep": "^1.15.9",
-    "@webref/css": "^6.17.5",
+    "@webref/css": "^6.18.0",
     "accept-language-parser": "^1.5.0",
     "async": "^3.2.6",
     "chalk": "^5.4.1",
@@ -103,7 +103,7 @@
     "cookie": "^0.7.2",
     "cookie-parser": "^1.4.7",
     "cross-spawn": "^7.0.6",
-    "css-tree": "^2.3.1",
+    "css-tree": "^3.1.0",
     "dayjs": "^1.11.13",
     "dexie": "^4.0.10",
     "dotenv": "^16.4.7",
diff --git a/yarn.lock b/yarn.lock
index c64bf4a1702e..ab3ddba2d4b0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3987,10 +3987,10 @@
   resolved "https://registry.yarnpkg.com/@webpack-cli/serve/-/serve-2.0.5.tgz#325db42395cd49fe6c14057f9a900e427df8810e"
   integrity sha512-lqaoKnRYBdo1UgDX8uF24AfGMifWK19TxPmM5FHc2vAGxrJ/qtyUyFBWoY1tISZdelsQ5fBcOusifo5o5wSJxQ==
 
-"@webref/css@^6.17.5":
-  version "6.17.5"
-  resolved "https://registry.yarnpkg.com/@webref/css/-/css-6.17.5.tgz#8a2fd737c0dc83f4f317a7e2d5e6a9eeeda033cb"
-  integrity sha512-5DGRIMChcxpYukzLaIlJRrvhsOKgmp9gFsMBwRpXrUSDgls4k719vaXel9FKdBNN4GZd5kelx84ptFCdSShyiA==
+"@webref/css@^6.18.0":
+  version "6.18.0"
+  resolved "https://registry.yarnpkg.com/@webref/css/-/css-6.18.0.tgz#ba843101d88249a8b2af95d4f035c1c8664a4c10"
+  integrity sha512-2AFAkzJuNykYJox3EnDLQNTjJXgvMSMFV6Z+roxlWcn94Uo2torGkQuPw81u7q9qsVCpdazGBZU5FLqrvXr2nA==
 
 "@xtuc/ieee754@^1.2.0":
   version "1.2.0"
@@ -5580,6 +5580,14 @@ css-tree@^2.3.1:
     mdn-data "2.0.30"
     source-map-js "^1.0.1"
 
+css-tree@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/css-tree/-/css-tree-3.1.0.tgz#7aabc035f4e66b5c86f54570d55e05b1346eb0fd"
+  integrity sha512-0eW44TGN5SQXU1mWSkKwFstI/22X2bG1nYzZTYMAWjylYURhse752YgbE4Cx46AC+bAvI+/dYTPRk1LqSUnu6w==
+  dependencies:
+    mdn-data "2.12.2"
+    source-map-js "^1.0.1"
+
 css-tree@~2.2.0:
   version "2.2.1"
   resolved "https://registry.yarnpkg.com/css-tree/-/css-tree-2.2.1.tgz#36115d382d60afd271e377f9c5f67d02bd48c032"
@@ -10386,6 +10394,11 @@ mdn-data@2.0.30:
   resolved "https://registry.yarnpkg.com/mdn-data/-/mdn-data-2.0.30.tgz#ce4df6f80af6cfbe218ecd5c552ba13c4dfa08cc"
   integrity sha512-GaqWWShW4kv/G9IEucWScBx9G1/vsFZZJUO+tD26M8J8z3Kw5RDQjaoZe03YAClgeS/SWPOcb4nkFBTEi5DUEA==
 
+mdn-data@2.12.2:
+  version "2.12.2"
+  resolved "https://registry.yarnpkg.com/mdn-data/-/mdn-data-2.12.2.tgz#9ae6c41a9e65adf61318b32bff7b64fbfb13f8cf"
+  integrity sha512-IEn+pegP1aManZuckezWCO+XZQDplx1366JoVhTpMpBB1sPey/SbveZQUosKiKiGYjg1wH4pMlNgXbCiYgihQA==
+
 mdn-data@^2.14.0:
   version "2.14.0"
   resolved "https://registry.yarnpkg.com/mdn-data/-/mdn-data-2.14.0.tgz#043dfa5db6b00cbb389e70ebc457c5d17591e17b"