diff --git a/.nvmrc b/.nvmrc
index a45fd52cc5..7273c0fa8c 100644
--- a/.nvmrc
+++ b/.nvmrc
@@ -1 +1 @@
-24
+25
diff --git a/package.json b/package.json
index a8e3e84f56..1ad12fed40 100644
--- a/package.json
+++ b/package.json
@@ -206,8 +206,8 @@
     "zod-to-json-schema": "catalog:"
   },
   "engines": {
-    "node": "24.x",
-    "pnpm": ">=11"
+    "node": ">=25",
+    "pnpm": ">=11.3"
   },
-  "packageManager": "pnpm@11.1.1"
+  "packageManager": "pnpm@11.3.0"
 }
diff --git a/vite.config.mts b/vite.config.mts
index 4313a0111c..848a07a3b6 100644
--- a/vite.config.mts
+++ b/vite.config.mts
@@ -651,6 +651,13 @@ export default defineConfig({
   test: {
     globals: true,
     environment: 'happy-dom',
+    // Node 25+ enables the Web Storage API by default, which shadows
+    // happy-dom's localStorage/sessionStorage with a non-functional Proxy.
+    // See https://github.com/capricorn86/happy-dom/issues/1950
+    execArgv:
+      Number(process.versions.node.split('.')[0]) >= 25
+        ? ['--no-experimental-webstorage']
+        : [],
     setupFiles: ['./vitest.setup.ts'],
     retry: process.env.CI ? 2 : 0,
     include: [