diff --git a/package-lock.json b/package-lock.json
index 4e42dda..2cafcad 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -33,7 +33,7 @@
         "eslint-config-standard-with-typescript": "^43.0.1",
         "eslint-plugin-simple-import-sort": "^12.0.0",
         "eslint-plugin-unused-imports": "^3.0.0",
-        "happy-dom": "^18.0.1",
+        "happy-dom": "^20.0.2",
         "prettier": "^3.0.0",
         "react": "^19.1.0",
         "react-dom": "^19.1.0",
@@ -4844,9 +4844,9 @@
       "license": "MIT"
     },
     "node_modules/happy-dom": {
-      "version": "18.0.1",
-      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-18.0.1.tgz",
-      "integrity": "sha512-qn+rKOW7KWpVTtgIUi6RVmTBZJSe2k0Db0vh1f7CWrWclkkc7/Q+FrOfkZIb2eiErLyqu5AXEzE7XthO9JVxRA==",
+      "version": "20.0.2",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.0.2.tgz",
+      "integrity": "sha512-pYOyu624+6HDbY+qkjILpQGnpvZOusItCk+rvF5/V+6NkcgTKnbOldpIy22tBnxoaLtlM9nXgoqAcW29/B7CIw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
diff --git a/package.json b/package.json
index 6fff107..3e4aa65 100644
--- a/package.json
+++ b/package.json
@@ -113,7 +113,7 @@
     "eslint-config-standard-with-typescript": "^43.0.1",
     "eslint-plugin-simple-import-sort": "^12.0.0",
     "eslint-plugin-unused-imports": "^3.0.0",
-    "happy-dom": "^18.0.1",
+    "happy-dom": "^20.0.2",
     "prettier": "^3.0.0",
     "react": "^19.1.0",
     "react-dom": "^19.1.0",