diff --git a/package-lock.json b/package-lock.json
index 1e45ce4..f89501e 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": "^15.11.7",
+        "happy-dom": "^20.0.11",
         "vitest": "^2.1.8"
       }
     },
@@ -1108,6 +1108,24 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/node": {
+      "version": "20.19.27",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.19.27.tgz",
+      "integrity": "sha512-N2clP5pJhB2YnZJ3PIHFk5RkygRX5WO/5f0WC08tp0wd+sv0rsJk3MqWn3CbNmT2J505a5336jaQj4ph1AdMug==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "undici-types": "~6.21.0"
+      }
+    },
+    "node_modules/@types/whatwg-mimetype": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/@types/whatwg-mimetype/-/whatwg-mimetype-3.0.2.tgz",
+      "integrity": "sha512-c2AKvDT8ToxLIOUlN51gTiHXflsfIFisS4pO7pDPoKouJCESkhZnEy623gwP9laCy5lnLDAw1vAzu2vM2YLOrA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@vitest/coverage-v8": {
       "version": "2.1.9",
       "resolved": "https://registry.npmjs.org/@vitest/coverage-v8/-/coverage-v8-2.1.9.tgz",
@@ -1526,19 +1544,6 @@
       "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",
@@ -1975,19 +1980,19 @@
       }
     },
     "node_modules/happy-dom": {
-      "version": "15.11.7",
-      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-15.11.7.tgz",
-      "integrity": "sha512-KyrFvnl+J9US63TEzwoiJOQzZBJY7KgBushJA8X61DMbNsH+2ONkDuLDnCnwUiPTF42tLoEmrPyoqbenVA5zrg==",
+      "version": "20.0.11",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.0.11.tgz",
+      "integrity": "sha512-QsCdAUHAmiDeKeaNojb1OHOPF7NjcWPBR7obdu3NwH2a/oyQaLg5d0aaCy/9My6CdPChYF07dvz5chaXBGaD4g==",
       "dev": true,
       "license": "MIT",
       "peer": true,
       "dependencies": {
-        "entities": "^4.5.0",
-        "webidl-conversions": "^7.0.0",
+        "@types/node": "^20.0.0",
+        "@types/whatwg-mimetype": "^3.0.2",
         "whatwg-mimetype": "^3.0.0"
       },
       "engines": {
-        "node": ">=18.0.0"
+        "node": ">=20.0.0"
       }
     },
     "node_modules/has-flag": {
@@ -2860,6 +2865,13 @@
         "node": ">= 0.8.0"
       }
     },
+    "node_modules/undici-types": {
+      "version": "6.21.0",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
+      "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/uri-js": {
       "version": "4.4.1",
       "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.4.1.tgz",
@@ -3021,16 +3033,6 @@
         }
       }
     },
-    "node_modules/webidl-conversions": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-7.0.0.tgz",
-      "integrity": "sha512-VwddBukDzu71offAQR975unBIGqfKZpM+8ZX6ySk8nYhVoo5CYaZyzt3YBvYtRtO+aoGlqxPg/B87NGVZ/fu6g==",
-      "dev": true,
-      "license": "BSD-2-Clause",
-      "engines": {
-        "node": ">=12"
-      }
-    },
     "node_modules/whatwg-mimetype": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/whatwg-mimetype/-/whatwg-mimetype-3.0.0.tgz",
diff --git a/package.json b/package.json
index c246577..419e20f 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
   "devDependencies": {
     "vitest": "^2.1.8",
     "@vitest/coverage-v8": "^2.1.8",
-    "happy-dom": "^15.11.7",
+    "happy-dom": "^20.0.11",
     "eslint": "^9.39.2"
   }
 }