diff --git a/apps/as/app/api/proxy/[...url]/route.ts b/apps/as/app/api/proxy/[...url]/route.ts
index b32008942..d54f08656 100644
--- a/apps/as/app/api/proxy/[...url]/route.ts
+++ b/apps/as/app/api/proxy/[...url]/route.ts
@@ -68,7 +68,7 @@ async function handler(
         cookieStore.set(REFRESH_TOKEN, refreshToken, {
           httpOnly: true,
           sameSite: "strict",
-          domain: getCookieDomain(),
+          domain: COOKIE_DOMAIN,
           path: "/",
         });
       }
@@ -92,14 +92,3 @@ export async function PUT(request: Request, props: { params: Promise<{ url: stri
   const params = await props.params;
   return handler(request, params, "PUT");
 }
-
-function getCookieDomain(): string | undefined {
-  if (typeof window === "undefined") return undefined;
-
-  if (COOKIE_DOMAIN) return COOKIE_DOMAIN;
-
-  const { hostname } = window.location;
-  if (hostname === "localhost" || hostname === "127.0.0.1") return undefined;
-
-  return hostname;
-}