diff --git a/lib/auth/authOptions.ts b/lib/auth/authOptions.ts
index af81f39..c257c46 100644
--- a/lib/auth/authOptions.ts
+++ b/lib/auth/authOptions.ts
@@ -30,4 +30,16 @@ export const authOptions: NextAuthOptions = {
     maxAge: 30 * 24 * 60 * 60, // 30 days
   },
   secret: process.env.NEXTAUTH_SECRET,
+  cookies: {
+    sessionToken: {
+      name: `__Secure-next-auth.session-token`,
+      options: {
+        httpOnly: true,
+        sameSite: "lax",
+        path: "/",
+        secure: true,
+        domain: ".vibnai.com", // share across all subdomains (theia.vibnai.com, etc.)
+      },
+    },
+  },
 };