diff --git a/package-lock.json b/package-lock.json
index 0240fc478..130f53c4b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4861,9 +4861,9 @@
 			}
 		},
 		"node_modules/@webref/css": {
-			"version": "8.5.4",
-			"resolved": "https://registry.npmjs.org/@webref/css/-/css-8.5.4.tgz",
-			"integrity": "sha512-3t4LuTww0lNpJRi3k/Obb74xWc9+YVGcO0DNoc5k3+dmqIklcj3KHKBk4GHMwj4+zMwJXLpK7F2R9r3qTZg2Ag==",
+			"version": "8.5.5",
+			"resolved": "https://registry.npmjs.org/@webref/css/-/css-8.5.5.tgz",
+			"integrity": "sha512-i6R7FkwHJTK74VwMvul3V9rYN9Dq3NzJinaKadtg7DkMtvOwTuB5ZR3zGGCWr+nh7jcftymoThr3gKbBnvo3Hg==",
 			"dev": true,
 			"license": "MIT",
 			"peerDependencies": {
@@ -10128,7 +10128,7 @@
 			],
 			"license": "MIT-0",
 			"devDependencies": {
-				"@webref/css": "8.5.4",
+				"@webref/css": "^8.5.5",
 				"css-tree": "^3.2.1",
 				"postcss": "^8.5"
 			},
@@ -10445,7 +10445,7 @@
 				"@csstools/pack-test": "*",
 				"@csstools/postcss-bundler": "*",
 				"@csstools/postcss-tape": "*",
-				"@webref/css": "8.5.4"
+				"@webref/css": "^8.5.5"
 			},
 			"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 7703f2624..3d7676760 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": "8.5.4",
+		"@webref/css": "8.5.5",
 		"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 98459d9f3..8a8cca7fe 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": "8.5.4"
+		"@webref/css": "8.5.5"
 	},
 	"scripts": {
 		"prebuild": "node ./scripts/generate-plugins-data.mjs && eslint --fix ./src/plugins/*.mjs",