diff --git a/package-lock.json b/package-lock.json
index 330f7cf..e835f14 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -18,7 +18,7 @@
         "@nextcloud/vite-config": "^2.5.1",
         "@vitest/coverage-v8": "^3.2.4",
         "eslint": "^9.37.0",
-        "happy-dom": "^19.0.2",
+        "happy-dom": "^20.0.0",
         "typedoc": "^0.28.13",
         "typescript": "^5.9.3",
         "vite": "^7.1.9",
@@ -4852,9 +4852,9 @@
       "license": "MIT"
     },
     "node_modules/happy-dom": {
-      "version": "19.0.2",
-      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-19.0.2.tgz",
-      "integrity": "sha512-831CLbgDyjRbd2lApHZFsBDe56onuFcjsCBPodzWpzedTpeDr8CGZjs7iEIdNW1DVwSFRecfwzLpVyGBPamwGA==",
+      "version": "20.0.0",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.0.0.tgz",
+      "integrity": "sha512-GkWnwIFxVGCf2raNrxImLo397RdGhLapj5cT3R2PT7FwL62Ze1DROhzmYW7+J3p9105DYMVenEejEbnq5wA37w==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
diff --git a/package.json b/package.json
index 6a658a6..19aeaae 100644
--- a/package.json
+++ b/package.json
@@ -44,7 +44,7 @@
     "@nextcloud/vite-config": "^2.5.1",
     "@vitest/coverage-v8": "^3.2.4",
     "eslint": "^9.37.0",
-    "happy-dom": "^19.0.2",
+    "happy-dom": "^20.0.0",
     "typedoc": "^0.28.13",
     "typescript": "^5.9.3",
     "vite": "^7.1.9",