diff --git a/demos/tsx-dom-ssr-demo/package.json b/demos/tsx-dom-ssr-demo/package.json
index da71bc4..49f0adf 100644
--- a/demos/tsx-dom-ssr-demo/package.json
+++ b/demos/tsx-dom-ssr-demo/package.json
@@ -21,7 +21,7 @@
     "esbuild": "0.21.4",
     "esbuild-register": "3.5.0",
     "fastify": "4.27.0",
-    "happy-dom": "14.12.0",
+    "happy-dom": "15.10.2",
     "node-cache": "5.1.2",
     "pirates": "4.0.6",
     "scatman": "0.10.0",
diff --git a/package-lock.json b/package-lock.json
index 1da12e3..9a7b097 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -52,7 +52,7 @@
         "esbuild": "0.21.4",
         "esbuild-register": "3.5.0",
         "fastify": "4.27.0",
-        "happy-dom": "14.12.0",
+        "happy-dom": "15.10.2",
         "node-cache": "5.1.2",
         "pirates": "4.0.6",
         "scatman": "0.10.0",
@@ -1873,6 +1873,19 @@
       "resolved": "https://registry.npmjs.org/tsx-dom-types/-/tsx-dom-types-1.0.0.tgz",
       "integrity": "sha512-4r4IDcoRpfOQXs5skl74EQBCDAMP27+xHziFT1Yq0DgVn99p9GcY6x7B3E4dX+PxvlzT0FKFgMeSqXd2VeWh+Q=="
     },
+    "node_modules/@lusito/mono/node_modules/happy-dom": {
+      "version": "14.12.3",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-14.12.3.tgz",
+      "integrity": "sha512-vsYlEs3E9gLwA1Hp+w3qzu+RUDFf4VTT8cyKqVICoZ2k7WM++Qyd2LwzyTi5bqMJFiIC/vNpTDYuxdreENRK/g==",
+      "dependencies": {
+        "entities": "^4.5.0",
+        "webidl-conversions": "^7.0.0",
+        "whatwg-mimetype": "^3.0.0"
+      },
+      "engines": {
+        "node": ">=16.0.0"
+      }
+    },
     "node_modules/@lusito/prettier-config": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/@lusito/prettier-config/-/prettier-config-3.1.0.tgz",
@@ -4821,16 +4834,16 @@
       "integrity": "sha512-EtKwoO6kxCL9WO5xipiHTZlSzBm7WLT627TqC/uVRd0HKmq8NXyebnNYxDoBi7wt8eTWrUrKXCOVaFq9x1kgag=="
     },
     "node_modules/happy-dom": {
-      "version": "14.12.0",
-      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-14.12.0.tgz",
-      "integrity": "sha512-dHcnlGFY2o2CdxfuYpqwSrBrpj/Kuzv4u4f3TU5yHW1GL24dKij4pv1BRjXnXc3uWo8qsCbToF9weaDsm/He8A==",
+      "version": "15.10.2",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-15.10.2.tgz",
+      "integrity": "sha512-NbA5XrSovenJIIcfixCREX3ZnV7yHP4phhbfuxxf4CPn+LZpz/jIM9EqJ2DrPwgVDSMoAKH3pZwQvkbsSiCrUw==",
       "dependencies": {
         "entities": "^4.5.0",
         "webidl-conversions": "^7.0.0",
         "whatwg-mimetype": "^3.0.0"
       },
       "engines": {
-        "node": ">=16.0.0"
+        "node": ">=18.0.0"
       }
     },
     "node_modules/has-bigints": {
@@ -9111,7 +9124,7 @@
       "version": "1.0.0",
       "license": "MIT",
       "devDependencies": {
-        "happy-dom": "14.12.0"
+        "happy-dom": "15.10.2"
       }
     },
     "packages/scatman": {
diff --git a/packages/dom-helmet/package.json b/packages/dom-helmet/package.json
index 6f54561..ba6ea97 100644
--- a/packages/dom-helmet/package.json
+++ b/packages/dom-helmet/package.json
@@ -23,6 +23,6 @@
     "test": "jest"
   },
   "devDependencies": {
-    "happy-dom": "14.12.0"
+    "happy-dom": "15.10.2"
   }
 }