diff --git a/{{cookiecutter.repo_name}}/package-lock.json b/{{cookiecutter.repo_name}}/package-lock.json
index ac0574f9..03b08d47 100644
--- a/{{cookiecutter.repo_name}}/package-lock.json
+++ b/{{cookiecutter.repo_name}}/package-lock.json
@@ -33,7 +33,7 @@
         "eslint-import-resolver-typescript": "^3.6.1",
         "eslint-plugin-import": "^2.29.1",
         "fast-glob": "^3.3.2",
-        "happy-dom": "^14.12.3",
+        "happy-dom": "^15.8.4",
         "postcss": "^8.4.38",
         "postcss-nested": "^6.2.0",
         "sass": "^1.77.4",
@@ -3277,9 +3277,9 @@
       "dev": true
     },
     "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==",
+      "version": "15.8.4",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-15.8.4.tgz",
+      "integrity": "sha512-0xghS3Tnhd5Z9o8TW0OE4eihdq0LEbkKknO3k7rSlc90UK8uesaEcp0iRomqPddVWaQd0BJZFSNGGKmr/hvaZg==",
       "dev": true,
       "dependencies": {
         "entities": "^4.5.0",
@@ -3287,7 +3287,7 @@
         "whatwg-mimetype": "^3.0.0"
       },
       "engines": {
-        "node": ">=16.0.0"
+        "node": ">=18.0.0"
       }
     },
     "node_modules/hard-rejection": {
@@ -8790,9 +8790,9 @@
       "dev": true
     },
     "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==",
+      "version": "15.8.4",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-15.8.4.tgz",
+      "integrity": "sha512-0xghS3Tnhd5Z9o8TW0OE4eihdq0LEbkKknO3k7rSlc90UK8uesaEcp0iRomqPddVWaQd0BJZFSNGGKmr/hvaZg==",
       "dev": true,
       "requires": {
         "entities": "^4.5.0",
diff --git a/{{cookiecutter.repo_name}}/package.json b/{{cookiecutter.repo_name}}/package.json
index 8bb95d0e..0a10dfdc 100644
--- a/{{cookiecutter.repo_name}}/package.json
+++ b/{{cookiecutter.repo_name}}/package.json
@@ -23,7 +23,7 @@
     "eslint-import-resolver-typescript": "^3.6.1",
     "eslint-plugin-import": "^2.29.1",
     "fast-glob": "^3.3.2",
-    "happy-dom": "^14.12.3",
+    "happy-dom": "^15.8.4",
     "postcss": "^8.4.38",
     "postcss-nested": "^6.2.0",
     "sass": "^1.77.4",