diff --git a/package.json b/package.json
index d274b6d5..f9f698da 100644
--- a/package.json
+++ b/package.json
@@ -42,7 +42,7 @@
     "eslint-plugin-vue": "^9.33.0",
     "esno": "^4.8.0",
     "fs-extra": "^11.3.2",
-    "happy-dom": "^14.12.3",
+    "happy-dom": "^20.0.0",
     "markdown-it": "^14.1.0",
     "markdown-it-anchor": "^9.2.0",
     "markdown-it-link-attributes": "^4.0.1",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index dc1c2056..460350cb 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -100,8 +100,8 @@ importers:
         specifier: ^11.3.2
         version: 11.3.2
       happy-dom:
-        specifier: ^14.12.3
-        version: 14.12.3
+        specifier: ^20.0.0
+        version: 20.0.0
       markdown-it:
         specifier: ^14.1.0
         version: 14.1.0
@@ -161,7 +161,7 @@ importers:
         version: 0.6.1
       vitest:
         specifier: ^1.6.1
-        version: 1.6.1(@types/node@20.19.21)(happy-dom@14.12.3)(jsdom@24.1.3)(terser@5.44.0)
+        version: 1.6.1(@types/node@20.19.21)(happy-dom@20.0.0)(jsdom@24.1.3)(terser@5.44.0)
       vue-tsc:
         specifier: ^2.2.12
         version: 2.2.12(typescript@5.9.3)
@@ -1570,6 +1570,9 @@ packages:
   '@types/web-bluetooth@0.0.20':
     resolution: {integrity: sha512-g9gZnnXVq7gM7v3tJCWV/qw7w+KeOlSHAhgF9RytFyifW6AF61hdT2ucrYhPq9hLs5JIryeupHV3qGk95dH9ow==}
 
+  '@types/whatwg-mimetype@3.0.2':
+    resolution: {integrity: sha512-c2AKvDT8ToxLIOUlN51gTiHXflsfIFisS4pO7pDPoKouJCESkhZnEy623gwP9laCy5lnLDAw1vAzu2vM2YLOrA==}
+
   '@typescript-eslint/eslint-plugin@6.21.0':
     resolution: {integrity: sha512-oy9+hTPCUFpngkEZUSzbf9MxI65wbKFoQYsgPdILTfbUldp5ovUuphZVe4i30emU9M/kP+T64Di0mxl7dSw3MA==}
     engines: {node: ^16.0.0 || >=18.0.0}
@@ -2443,9 +2446,9 @@ packages:
     resolution: {integrity: sha512-5v6yZd4JK3eMI3FqqCouswVqwugaA9r4dNZB1wwcmrD02QkV5H0y7XBQW8QwQqEaZY1pM9aqORSORhJRdNK44Q==}
     engines: {node: '>=6.0'}
 
-  happy-dom@14.12.3:
-    resolution: {integrity: sha512-vsYlEs3E9gLwA1Hp+w3qzu+RUDFf4VTT8cyKqVICoZ2k7WM++Qyd2LwzyTi5bqMJFiIC/vNpTDYuxdreENRK/g==}
-    engines: {node: '>=16.0.0'}
+  happy-dom@20.0.0:
+    resolution: {integrity: sha512-GkWnwIFxVGCf2raNrxImLo397RdGhLapj5cT3R2PT7FwL62Ze1DROhzmYW7+J3p9105DYMVenEejEbnq5wA37w==}
+    engines: {node: '>=20.0.0'}
 
   has-bigints@1.1.0:
     resolution: {integrity: sha512-R3pbpkcIqv2Pm3dUwgjclDRVmWpTJW2DcMzcIhEXEx1oh/CEMObMm3KLmRJOdvhM7o4uQBnwr8pzRK2sJWIqfg==}
@@ -5410,6 +5413,8 @@ snapshots:
 
   '@types/web-bluetooth@0.0.20': {}
 
+  '@types/whatwg-mimetype@3.0.2': {}
+
   '@typescript-eslint/eslint-plugin@6.21.0(@typescript-eslint/parser@6.21.0(eslint@8.57.1)(typescript@5.9.3))(eslint@8.57.1)(typescript@5.9.3)':
     dependencies:
       '@eslint-community/regexpp': 4.12.1
@@ -6580,10 +6585,10 @@ snapshots:
       section-matter: 1.0.0
       strip-bom-string: 1.0.0
 
-  happy-dom@14.12.3:
+  happy-dom@20.0.0:
     dependencies:
-      entities: 4.5.0
-      webidl-conversions: 7.0.0
+      '@types/node': 20.19.21
+      '@types/whatwg-mimetype': 3.0.2
       whatwg-mimetype: 3.0.0
 
   has-bigints@1.1.0: {}
@@ -8018,7 +8023,7 @@ snapshots:
       fsevents: 2.3.3
       terser: 5.44.0
 
-  vitest@1.6.1(@types/node@20.19.21)(happy-dom@14.12.3)(jsdom@24.1.3)(terser@5.44.0):
+  vitest@1.6.1(@types/node@20.19.21)(happy-dom@20.0.0)(jsdom@24.1.3)(terser@5.44.0):
     dependencies:
       '@vitest/expect': 1.6.1
       '@vitest/runner': 1.6.1
@@ -8042,7 +8047,7 @@ snapshots:
       why-is-node-running: 2.3.0
     optionalDependencies:
       '@types/node': 20.19.21
-      happy-dom: 14.12.3
+      happy-dom: 20.0.0
       jsdom: 24.1.3
     transitivePeerDependencies:
       - less