diff --git a/demo/nextjs/lib/auth.ts b/demo/nextjs/lib/auth.ts
index 82e041ab1e..c6505900d7 100644
--- a/demo/nextjs/lib/auth.ts
+++ b/demo/nextjs/lib/auth.ts
@@ -50,23 +50,8 @@ if (!dialect) {
 	throw new Error("No dialect found");
 }
 
-const baseURL: string | undefined =
-	process.env.VERCEL === "1"
-		? process.env.BETTER_AUTH_URL
-			? process.env.BETTER_AUTH_URL
-			: `https://${process.env.VERCEL_URL}`
-		: undefined;
-
-const cookieDomain: string | undefined =
-	process.env.VERCEL === "1"
-		? process.env.BETTER_AUTH_URL
-			? new URL(process.env.BETTER_AUTH_URL).hostname
-			: `.${process.env.VERCEL_URL}`
-		: undefined;
-
 export const auth = betterAuth({
 	appName: "Better Auth Demo",
-	baseURL,
 	database: {
 		dialect,
 		type: "sqlite",
@@ -351,10 +336,4 @@ export const auth = betterAuth({
 		lastLoginMethod(),
 	],
 	trustedOrigins: ["exp://", "https://appleid.apple.com"],
-	advanced: {
-		crossSubDomainCookies: {
-			enabled: process.env.NODE_ENV === "production",
-			domain: cookieDomain,
-		},
-	},
 });