diff --git a/package-lock.json b/package-lock.json
index dadb799..5dde0a6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19,7 +19,7 @@
         "@types/node": "^25.6.0",
         "@vitest/coverage-v8": "^4.1.4",
         "eslint": "^10.2.1",
-        "happy-dom": "^20.8.9",
+        "happy-dom": "^20.9.0",
         "typedoc": "^0.28.19",
         "typedoc-plugin-missing-exports": "^4.1.3",
         "typescript": "^6.0.3",
@@ -4734,9 +4734,9 @@
       "license": "ISC"
     },
     "node_modules/happy-dom": {
-      "version": "20.8.9",
-      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.8.9.tgz",
-      "integrity": "sha512-Tz23LR9T9jOGVZm2x1EPdXqwA37G/owYMxRwU0E4miurAtFsPMQ1d2Jc2okUaSjZqAFz2oEn3FLXC5a0a+siyA==",
+      "version": "20.9.0",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.9.0.tgz",
+      "integrity": "sha512-GZZ9mKe8r646NUAf/zemnGbjYh4Bt8/MqASJY+pSm5ZDtc3YQox+4gsLI7yi1hba6o+eCsGxpHn5+iEVn31/FQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
diff --git a/package.json b/package.json
index 5ea912c..0d3e431 100644
--- a/package.json
+++ b/package.json
@@ -52,7 +52,7 @@
     "@types/node": "^25.6.0",
     "@vitest/coverage-v8": "^4.1.4",
     "eslint": "^10.2.1",
-    "happy-dom": "^20.8.9",
+    "happy-dom": "^20.9.0",
     "typedoc": "^0.28.19",
     "typedoc-plugin-missing-exports": "^4.1.3",
     "typescript": "^6.0.3",