diff --git a/package-lock.json b/package-lock.json
index aa24d8b8..0951c1f9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -31,7 +31,7 @@
         "@vue/test-utils": "^2.4.6",
         "@vue/tsconfig": "^0.9.0",
         "browserslist": "^4.28.1",
-        "happy-dom": "^20.8.4",
+        "happy-dom": "^20.8.9",
         "typescript": "^5.9.3",
         "vite": "^7.3.1",
         "vitest": "^4.0.13"
@@ -6267,9 +6267,9 @@
       "license": "ISC"
     },
     "node_modules/happy-dom": {
-      "version": "20.8.4",
-      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.8.4.tgz",
-      "integrity": "sha512-GKhjq4OQCYB4VLFBzv8mmccUadwlAusOZOI7hC1D9xDIT5HhzkJK17c4el2f6R6C715P9xB4uiMxeKUa2nHMwQ==",
+      "version": "20.8.9",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.8.9.tgz",
+      "integrity": "sha512-Tz23LR9T9jOGVZm2x1EPdXqwA37G/owYMxRwU0E4miurAtFsPMQ1d2Jc2okUaSjZqAFz2oEn3FLXC5a0a+siyA==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
diff --git a/package.json b/package.json
index 76330b06..208dee14 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
     "@vue/test-utils": "^2.4.6",
     "@vue/tsconfig": "^0.9.0",
     "browserslist": "^4.28.1",
-    "happy-dom": "^20.8.4",
+    "happy-dom": "^20.8.9",
     "typescript": "^5.9.3",
     "vite": "^7.3.1",
     "vitest": "^4.0.13"