diff --git a/package-lock.json b/package-lock.json
index 4e5904270..617705887 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -27,7 +27,7 @@
         "@types/better-sqlite3": "^7.6.13",
         "@types/node": "^25.5.0",
         "@vitest/coverage-v8": "^3.0.0",
-        "happy-dom": "^20.8.4",
+        "happy-dom": "^20.9.0",
         "typescript": "^5.7.0",
         "vitest": "^3.0.0"
       },
@@ -2691,9 +2691,9 @@
       }
     },
     "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": "20.9.0",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.9.0.tgz",
+      "integrity": "sha512-GZZ9mKe8r646NUAf/zemnGbjYh4Bt8/MqASJY+pSm5ZDtc3YQox+4gsLI7yi1hba6o+eCsGxpHn5+iEVn31/FQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
diff --git a/package.json b/package.json
index 91f4a6ab7..a039943fb 100644
--- a/package.json
+++ b/package.json
@@ -84,7 +84,7 @@
     "@types/better-sqlite3": "^7.6.13",
     "@types/node": "^25.5.0",
     "@vitest/coverage-v8": "^3.0.0",
-    "happy-dom": "^20.8.4",
+    "happy-dom": "^20.9.0",
     "typescript": "^5.7.0",
     "vitest": "^3.0.0"
   }