diff --git a/package-lock.json b/package-lock.json
index 12878fc..6802526 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,7 +13,7 @@
         "@types/node": "^25.0.5",
         "@vitest/coverage-v8": "^4.0.17",
         "eslint": "^9.39.2",
-        "happy-dom": "^20.1.0",
+        "happy-dom": "^20.3.1",
         "typedoc": "^0.28.16",
         "typescript": "5.9.3",
         "vitest": "^4.0.7"
@@ -2512,9 +2512,9 @@
       "dev": true
     },
     "node_modules/happy-dom": {
-      "version": "20.1.0",
-      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.1.0.tgz",
-      "integrity": "sha512-ebvqjBqzenBk2LjzNEAzoj7yhw7rW/R2/wVevMu6Mrq3MXtcI/RUz4+ozpcOcqVLEWPqLfg2v9EAU7fFXZUUJw==",
+      "version": "20.3.1",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.3.1.tgz",
+      "integrity": "sha512-tLvsizNno05Hij0PoB0QN/S8xf0YU2AGvO11/JlJDw5McA/gzyn0Ni1RwbTI1/zteUbOekJH0t6q8HFvjbxsGg==",
       "dev": true,
       "dependencies": {
         "@types/node": "^20.0.0",
@@ -5362,9 +5362,9 @@
       "dev": true
     },
     "happy-dom": {
-      "version": "20.1.0",
-      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.1.0.tgz",
-      "integrity": "sha512-ebvqjBqzenBk2LjzNEAzoj7yhw7rW/R2/wVevMu6Mrq3MXtcI/RUz4+ozpcOcqVLEWPqLfg2v9EAU7fFXZUUJw==",
+      "version": "20.3.1",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.3.1.tgz",
+      "integrity": "sha512-tLvsizNno05Hij0PoB0QN/S8xf0YU2AGvO11/JlJDw5McA/gzyn0Ni1RwbTI1/zteUbOekJH0t6q8HFvjbxsGg==",
       "dev": true,
       "requires": {
         "@types/node": "^20.0.0",
diff --git a/package.json b/package.json
index 98d5727..90a4b46 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "@types/node": "^25.0.5",
     "@vitest/coverage-v8": "^4.0.17",
     "eslint": "^9.39.2",
-    "happy-dom": "^20.1.0",
+    "happy-dom": "^20.3.1",
     "typedoc": "^0.28.16",
     "typescript": "5.9.3",
     "vitest": "^4.0.7"