diff --git a/package-lock.json b/package-lock.json
index fb26e81..f9ab6fc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -18,7 +18,7 @@
         "@types/node": "^25.3.2",
         "@vitest/coverage-v8": "^4.0.18",
         "eslint": "^9.29.0",
-        "happy-dom": "^20.7.0",
+        "happy-dom": "^20.8.3",
         "typedoc": "^0.28.17",
         "typescript": "^5.9.3",
         "vitest": "^4.0.7"
@@ -3087,9 +3087,9 @@
       }
     },
     "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 de5aae7..d7cb0c3 100644
--- a/package.json
+++ b/package.json
@@ -59,7 +59,7 @@
     "@types/node": "^25.3.2",
     "@vitest/coverage-v8": "^4.0.18",
     "eslint": "^9.29.0",
-    "happy-dom": "^20.7.0",
+    "happy-dom": "^20.8.3",
     "typedoc": "^0.28.17",
     "typescript": "^5.9.3",
     "vitest": "^4.0.7"