diff --git a/package-lock.json b/package-lock.json
index acffc39c2..19658f748 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4482,9 +4482,9 @@
 			}
 		},
 		"node_modules/@webref/css": {
-			"version": "6.22.0",
-			"resolved": "https://registry.npmjs.org/@webref/css/-/css-6.22.0.tgz",
-			"integrity": "sha512-GDY4aPOD+m9pntMfzpbXa1XEMc+wcXBuX1ok1OPrNhcdj1PcZrbZji8Y6wM4z6Dhdm4sjNHxzLS5zvrft4Lr4Q==",
+			"version": "7.1.0",
+			"resolved": "https://registry.npmjs.org/@webref/css/-/css-7.1.0.tgz",
+			"integrity": "sha512-a9XGQw4pYadCAIwRnREpy/+ZEL5E1oi/EARdTUK3evNGYJbec2MSpHeWorIBbtfITbDD0HPdSIatFMFQCPgJJg==",
 			"dev": true,
 			"license": "MIT",
 			"peerDependencies": {
@@ -9537,7 +9537,7 @@
 			],
 			"license": "MIT-0",
 			"devDependencies": {
-				"@webref/css": "6.22.0",
+				"@webref/css": "7.1.0",
 				"css-tree": "^3.1.0"
 			},
 			"engines": {
@@ -9843,7 +9843,7 @@
 				"@csstools/pack-test": "*",
 				"@csstools/postcss-bundler": "*",
 				"@csstools/postcss-tape": "*",
-				"@webref/css": "6.22.0"
+				"@webref/css": "7.1.0"
 			},
 			"engines": {
 				"node": ">=18"
diff --git a/packages/css-syntax-patches-for-csstree/package.json b/packages/css-syntax-patches-for-csstree/package.json
index c83dc5425..e046f0d51 100644
--- a/packages/css-syntax-patches-for-csstree/package.json
+++ b/packages/css-syntax-patches-for-csstree/package.json
@@ -39,7 +39,7 @@
 		"postcss": "^8.4"
 	},
 	"devDependencies": {
-		"@webref/css": "6.22.0",
+		"@webref/css": "7.1.0",
 		"css-tree": "^3.1.0"
 	},
 	"scripts": {
diff --git a/plugin-packs/postcss-preset-env/package.json b/plugin-packs/postcss-preset-env/package.json
index 10d0c71ee..577229c20 100644
--- a/plugin-packs/postcss-preset-env/package.json
+++ b/plugin-packs/postcss-preset-env/package.json
@@ -127,7 +127,7 @@
 		"@csstools/pack-test": "*",
 		"@csstools/postcss-bundler": "*",
 		"@csstools/postcss-tape": "*",
-		"@webref/css": "6.22.0"
+		"@webref/css": "7.1.0"
 	},
 	"scripts": {
 		"prebuild": "node ./scripts/generate-plugins-data.mjs && eslint --fix ./src/plugins/*.mjs",