diff --git a/app/api/auth/callback/route.ts b/app/api/auth/callback/route.ts
index a8b316d..bee5e84 100644
--- a/app/api/auth/callback/route.ts
+++ b/app/api/auth/callback/route.ts
@@ -51,8 +51,8 @@ export async function GET(req: Request) {
     secure: isHttps,
     sameSite: "none",
     path: "/",
+    ...(env.COOKIE_DOMAIN ? { domain: env.COOKIE_DOMAIN } : {}),
     maxAge: data.expires_in,
-    ...(BASE_URL ? { BASE_URL } : {}),
   });
 
   return res;
diff --git a/app/api/session/route.ts b/app/api/session/route.ts
index dbd93b8..156069e 100644
--- a/app/api/session/route.ts
+++ b/app/api/session/route.ts
@@ -1,3 +1,4 @@
+import { env } from "@/lib/env";
 import { NextResponse } from "next/server";
 
 export async function POST(req: Request) {
@@ -9,6 +10,7 @@ export async function POST(req: Request) {
     httpOnly: true,
     secure: true,
     sameSite: "none",
+    ...(env.COOKIE_DOMAIN ? { domain: env.COOKIE_DOMAIN } : {}),
     path: "/",
   });