diff --git a/package-lock.json b/package-lock.json
index f465240..7abd982 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19,7 +19,7 @@
         "@types/node": "^25.3.2",
         "@vitest/coverage-v8": "^4.0.18",
         "eslint": "^10.0.2",
-        "happy-dom": "^20.7.0",
+        "happy-dom": "^20.8.3",
         "typedoc": "^0.28.17",
         "typedoc-plugin-missing-exports": "^4.1.2",
         "typescript": "^5.9.3",
@@ -4794,9 +4794,9 @@
       "license": "ISC"
     },
     "node_modules/happy-dom": {
-      "version": "20.7.0",
-      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.7.0.tgz",
-      "integrity": "sha512-hR/uLYQdngTyEfxnOoa+e6KTcfBFyc1hgFj/Cc144A5JJUuHFYqIEBDcD4FeGqUeKLRZqJ9eN9u7/GDjYEgS1g==",
+      "version": "20.8.3",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.8.3.tgz",
+      "integrity": "sha512-lMHQRRwIPyJ70HV0kkFT7jH/gXzSI7yDkQFe07E2flwmNDFoWUTRMKpW2sglsnpeA7b6S2TJPp98EbQxai8eaQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
diff --git a/package.json b/package.json
index dd8952b..6a6135f 100644
--- a/package.json
+++ b/package.json
@@ -52,7 +52,7 @@
     "@types/node": "^25.3.2",
     "@vitest/coverage-v8": "^4.0.18",
     "eslint": "^10.0.2",
-    "happy-dom": "^20.7.0",
+    "happy-dom": "^20.8.3",
     "typedoc": "^0.28.17",
     "typedoc-plugin-missing-exports": "^4.1.2",
     "typescript": "^5.9.3",