diff --git a/app/api/me/timezone/route.ts b/app/api/me/timezone/route.ts
index 98915bd..fc8f407 100644
--- a/app/api/me/timezone/route.ts
+++ b/app/api/me/timezone/route.ts
@@ -83,7 +83,7 @@ export async function PUT(request: NextRequest): Promise<NextResponse> {
   try {
     // Authoritative write target: session.user.id. NO userId from body.
     const result = await postgresClient.query<{ timezone: string }>(
-      'UPDATE "user" SET timezone = $1, updated_at = NOW() WHERE id = $2 RETURNING timezone',
+      'UPDATE "user" SET timezone = $1, "updatedAt" = NOW() WHERE id = $2 RETURNING timezone',
       [candidate, session!.user.id],
     );
     if (result.rowCount === 0) {