diff --git a/package-lock.json b/package-lock.json
index cd0116505..d2fc6772f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3847,9 +3847,9 @@
 			}
 		},
 		"node_modules/@webref/css": {
-			"version": "8.7.6",
-			"resolved": "https://registry.npmjs.org/@webref/css/-/css-8.7.6.tgz",
-			"integrity": "sha512-4WOCmMwo5f0B0M7aXjI0A5RS/ggf+ojRBNZzptwE9RgRcsH7YCnAiVqBYqmYaOTpiSuOsKQbQVNUTIn7PpldAQ==",
+			"version": "8.7.7",
+			"resolved": "https://registry.npmjs.org/@webref/css/-/css-8.7.7.tgz",
+			"integrity": "sha512-ogXTnLVHBXTsMX4HYY55jWandh41SiPsMSVBLnh5Q0f9k3WRpa/PICmLgGtYC0vvG4eWtpYlCbr/vN/sJCZqAQ==",
 			"dev": true,
 			"license": "MIT",
 			"peerDependencies": {
@@ -8308,7 +8308,7 @@
 			],
 			"license": "MIT-0",
 			"devDependencies": {
-				"@webref/css": "^8.7.5",
+				"@webref/css": "^8.7.7",
 				"css-tree": "^3.2.1",
 				"postcss": "^8.5"
 			},
@@ -8652,7 +8652,7 @@
 				"@csstools/pack-test": "*",
 				"@csstools/postcss-bundler": "*",
 				"@csstools/postcss-tape": "*",
-				"@webref/css": "^8.7.5"
+				"@webref/css": "^8.7.7"
 			},
 			"engines": {
 				"node": ">=20.19.0"
@@ -10609,7 +10609,7 @@
 			},
 			"devDependencies": {
 				"@csstools/postcss-tape": "*",
-				"@webref/css": "^8.7.5"
+				"@webref/css": "^8.7.7"
 			},
 			"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 ef5da1305..ef9c1dbdc 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": "^8.7.5",
+		"@webref/css": "^8.7.7",
 		"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 61602bc7c..499434bf1 100644
--- a/plugin-packs/postcss-preset-env/package.json
+++ b/plugin-packs/postcss-preset-env/package.json
@@ -131,7 +131,7 @@
 		"@csstools/pack-test": "*",
 		"@csstools/postcss-bundler": "*",
 		"@csstools/postcss-tape": "*",
-		"@webref/css": "^8.7.5"
+		"@webref/css": "^8.7.7"
 	},
 	"scripts": {
 		"prebuild": "node ./scripts/generate-plugins-data.mjs && eslint --fix ./src/plugins/*.mjs",
diff --git a/plugins/postcss-progressive-custom-properties/package.json b/plugins/postcss-progressive-custom-properties/package.json
index a8cfc19b2..4d90fecae 100644
--- a/plugins/postcss-progressive-custom-properties/package.json
+++ b/plugins/postcss-progressive-custom-properties/package.json
@@ -38,7 +38,7 @@
 	},
 	"devDependencies": {
 		"@csstools/postcss-tape": "*",
-		"@webref/css": "^8.7.5"
+		"@webref/css": "^8.7.7"
 	},
 	"scripts": {
 		"build": "node ./scripts/matchers.mjs && node ./scripts/shorthands.mjs && eslint --fix ./src/matchers.ts ./src/shorthands.ts  && rollup -c ../../rollup/default.mjs",