diff --git a/cloudproxy-ui/package-lock.json b/cloudproxy-ui/package-lock.json
index 3f78113..d6e166a 100644
--- a/cloudproxy-ui/package-lock.json
+++ b/cloudproxy-ui/package-lock.json
@@ -31,7 +31,7 @@
         "cypress": "^14.5.4",
         "eslint": "^8.57.0",
         "eslint-plugin-vue": "^9.22.0",
-        "happy-dom": "^18.0.1",
+        "happy-dom": "^20.0.0",
         "msw": "^2.10.5",
         "vitest": "^3.2.4",
         "wait-on": "^8.0.4"
@@ -9420,9 +9420,9 @@
       "license": "MIT"
     },
     "node_modules/happy-dom": {
-      "version": "18.0.1",
-      "resolved": "https://registry.npmjs.org/happy-dom/-/happy-dom-18.0.1.tgz",
-      "integrity": "sha512-qn+rKOW7KWpVTtgIUi6RVmTBZJSe2k0Db0vh1f7CWrWclkkc7/Q+FrOfkZIb2eiErLyqu5AXEzE7XthO9JVxRA==",
+      "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/cloudproxy-ui/package.json b/cloudproxy-ui/package.json
index 0d70f80..637fb35 100644
--- a/cloudproxy-ui/package.json
+++ b/cloudproxy-ui/package.json
@@ -39,7 +39,7 @@
     "cypress": "^14.5.4",
     "eslint": "^8.57.0",
     "eslint-plugin-vue": "^9.22.0",
-    "happy-dom": "^18.0.1",
+    "happy-dom": "^20.0.0",
     "msw": "^2.10.5",
     "vitest": "^3.2.4",
     "wait-on": "^8.0.4"