diff --git a/package-lock.json b/package-lock.json
index 3cbf521..6872187 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,7 +11,7 @@
       "devDependencies": {
         "@vitest/coverage-v8": "^2.1.8",
         "eslint": "^9.39.2",
-        "happy-dom": "^20.1.0",
+        "happy-dom": "^20.4.0",
         "vitest": "^2.1.8"
       }
     },
@@ -1552,6 +1552,19 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/entities": {
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/entities/-/entities-4.5.0.tgz",
+      "integrity": "sha512-V0hjH4dGPh9Ao5p0MoRY6BVqtwCjhz6vI5LT8AJ55H+4g9/4vbHx1I54fS0XuclLhDHArPQCiMjDxjaL8fPxhw==",
+      "dev": true,
+      "license": "BSD-2-Clause",
+      "engines": {
+        "node": ">=0.12"
+      },
+      "funding": {
+        "url": "https://github.com/fb55/entities?sponsor=1"
+      }
+    },
     "node_modules/es-module-lexer": {
       "version": "1.7.0",
       "resolved": "https://registry.npmjs.org/es-module-lexer/-/es-module-lexer-1.7.0.tgz",
@@ -1987,15 +2000,16 @@
       }
     },
     "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": "20.4.0",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.4.0.tgz",
+      "integrity": "sha512-RDeQm3dT9n0A5f/TszjUmNCLEuPnMGv3Tv4BmNINebz/h17PA6LMBcxJ5FrcqltNBMh9jA/8ufgDdBYUdBt+eg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@types/node": "^20.0.0",
+        "@types/node": ">=20.0.0",
         "@types/whatwg-mimetype": "^3.0.2",
         "@types/ws": "^8.18.1",
+        "entities": "^4.5.0",
         "whatwg-mimetype": "^3.0.0",
         "ws": "^8.18.3"
       },
diff --git a/package.json b/package.json
index 62f804f..96764f2 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
   "devDependencies": {
     "vitest": "^2.1.8",
     "@vitest/coverage-v8": "^2.1.8",
-    "happy-dom": "^20.1.0",
+    "happy-dom": "^20.4.0",
     "eslint": "^9.39.2"
   }
 }