diff --git a/package.json b/package.json
index 8cff570..f968c41 100644
--- a/package.json
+++ b/package.json
@@ -71,12 +71,12 @@
   "devDependencies": {
     "@csstools/css-parser-algorithms": "^3.0.5",
     "@csstools/css-tokenizer": "^3.0.4",
-    "@types/postcss-js": "^4.0.4",
+    "@types/postcss-js": "^4.1.0",
     "@types/stylelint": "^14.0.0",
     "@types/typescript": "^2.0.0",
-    "typescript": "^5.8.3"
+    "typescript": "^5.9.3"
   },
-  "packageManager": "yarn@4.9.2",
+  "packageManager": "yarn@4.12.0",
   "engines": {
     "node": ">=22"
   },