diff --git a/ui/package-lock.json b/ui/package-lock.json
index 89a6589e6..c0901a73d 100644
--- a/ui/package-lock.json
+++ b/ui/package-lock.json
@@ -59,7 +59,7 @@
         "eslint-plugin-react": "^7.37.5",
         "eslint-plugin-react-hooks": "^5.2.0",
         "eslint-plugin-react-refresh": "^0.4.24",
-        "happy-dom": "^17.4.7",
+        "happy-dom": "^20.0.8",
         "jsdom": "^26.1.0",
         "prettier": "^3.6.2",
         "ra-test": "^3.19.12",
@@ -3093,6 +3093,13 @@
       "resolved": "https://registry.npmjs.org/@types/trusted-types/-/trusted-types-2.0.7.tgz",
       "integrity": "sha512-ScaPdn1dQczgbl0QFTeTOmVHFULt394XJgOQNoyVhZ6r2vLnMLJfBPd53SB52T/3G36VI1/g2MZaX0cwDuXsfw=="
     },
+    "node_modules/@types/whatwg-mimetype": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/@types/whatwg-mimetype/-/whatwg-mimetype-3.0.2.tgz",
+      "integrity": "sha512-c2AKvDT8ToxLIOUlN51gTiHXflsfIFisS4pO7pDPoKouJCESkhZnEy623gwP9laCy5lnLDAw1vAzu2vM2YLOrA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/yargs": {
       "version": "15.0.19",
       "resolved": "https://registry.npmjs.org/@types/yargs/-/yargs-15.0.19.tgz",
@@ -6180,18 +6187,37 @@
       "dev": true
     },
     "node_modules/happy-dom": {
-      "version": "17.4.7",
-      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-17.4.7.tgz",
-      "integrity": "sha512-NZypxadhCiV5NT4A+Y86aQVVKQ05KDmueja3sz008uJfDRwz028wd0aTiJPwo4RQlvlz0fznkEEBBCHVNWc08g==",
+      "version": "20.0.8",
+      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-20.0.8.tgz",
+      "integrity": "sha512-TlYaNQNtzsZ97rNMBAm8U+e2cUQXNithgfCizkDgc11lgmN4j9CKMhO3FPGKWQYPwwkFcPpoXYF/CqEPLgzfOg==",
       "dev": true,
+      "license": "MIT",
       "dependencies": {
-        "webidl-conversions": "^7.0.0",
+        "@types/node": "^20.0.0",
+        "@types/whatwg-mimetype": "^3.0.2",
         "whatwg-mimetype": "^3.0.0"
       },
       "engines": {
-        "node": ">=18.0.0"
+        "node": ">=20.0.0"
       }
     },
+    "node_modules/happy-dom/node_modules/@types/node": {
+      "version": "20.19.23",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.19.23.tgz",
+      "integrity": "sha512-yIdlVVVHXpmqRhtyovZAcSy0MiPcYWGkoO4CGe/+jpP0hmNuihm4XhHbADpK++MsiLHP5MVlv+bcgdF99kSiFQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "undici-types": "~6.21.0"
+      }
+    },
+    "node_modules/happy-dom/node_modules/undici-types": {
+      "version": "6.21.0",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
+      "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/hard-rejection": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/hard-rejection/-/hard-rejection-2.1.0.tgz",
diff --git a/ui/package.json b/ui/package.json
index 3a39e5f32..a3612aaf4 100644
--- a/ui/package.json
+++ b/ui/package.json
@@ -68,7 +68,7 @@
     "eslint-plugin-react": "^7.37.5",
     "eslint-plugin-react-hooks": "^5.2.0",
     "eslint-plugin-react-refresh": "^0.4.24",
-    "happy-dom": "^17.4.7",
+    "happy-dom": "^20.0.8",
     "jsdom": "^26.1.0",
     "prettier": "^3.6.2",
     "ra-test": "^3.19.12",