diff --git a/package-lock.json b/package-lock.json
index 478de8954..ff6ecad92 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4822,9 +4822,9 @@
 			}
 		},
 		"node_modules/@webref/css": {
-			"version": "8.5.7",
-			"resolved": "https://registry.npmjs.org/@webref/css/-/css-8.5.7.tgz",
-			"integrity": "sha512-68w+5WDj76ZKr8zFIesWCvBr/5uUfRodTbSkoqtaF15ufKKJ8KpgbsJcH8c67Dh7Lbx2mBCgp7KiNaEhjMREsw==",
+			"version": "8.5.8",
+			"resolved": "https://registry.npmjs.org/@webref/css/-/css-8.5.8.tgz",
+			"integrity": "sha512-ssi9a6n2Ed28OEojFPxrUI1w8AA9b9gOZB2iRqCFXWZkvCSiwRzvxB8HQ8U7vwF90ftC6TnsNU6ajIFjB1P74Q==",
 			"dev": true,
 			"license": "MIT",
 			"peerDependencies": {
@@ -9537,7 +9537,7 @@
 			],
 			"license": "MIT-0",
 			"devDependencies": {
-				"@webref/css": "^8.5.7",
+				"@webref/css": "^8.5.8",
 				"css-tree": "^3.2.1",
 				"postcss": "^8.5"
 			},
@@ -9854,7 +9854,7 @@
 				"@csstools/pack-test": "*",
 				"@csstools/postcss-bundler": "*",
 				"@csstools/postcss-tape": "*",
-				"@webref/css": "8.5.7"
+				"@webref/css": "^8.5.8"
 			},
 			"engines": {
 				"node": ">=20.19.0"
diff --git a/packages/css-syntax-patches-for-csstree/package.json b/packages/css-syntax-patches-for-csstree/package.json
index 22cd4bb1d..b5b73a317 100644
--- a/packages/css-syntax-patches-for-csstree/package.json
+++ b/packages/css-syntax-patches-for-csstree/package.json
@@ -41,7 +41,7 @@
 		}
 	},
 	"devDependencies": {
-		"@webref/css": "^8.5.7",
+		"@webref/css": "^8.5.8",
 		"css-tree": "^3.2.1",
 		"postcss": "^8.5"
 	},
diff --git a/plugin-packs/postcss-preset-env/package.json b/plugin-packs/postcss-preset-env/package.json
index 25b1358fa..4a9d02c5a 100644
--- a/plugin-packs/postcss-preset-env/package.json
+++ b/plugin-packs/postcss-preset-env/package.json
@@ -128,7 +128,7 @@
 		"@csstools/pack-test": "*",
 		"@csstools/postcss-bundler": "*",
 		"@csstools/postcss-tape": "*",
-		"@webref/css": "8.5.7"
+		"@webref/css": "8.5.8"
 	},
 	"scripts": {
 		"prebuild": "node ./scripts/generate-plugins-data.mjs && eslint --fix ./src/plugins/*.mjs",