diff --git a/packages/app-store/slackmessaging/api/add.ts b/packages/app-store/slackmessaging/api/add.ts
index e4aa5143d5..c8afab68b6 100644
--- a/packages/app-store/slackmessaging/api/add.ts
+++ b/packages/app-store/slackmessaging/api/add.ts
@@ -4,7 +4,7 @@ import { stringify } from "querystring";
 import prisma from "@calcom/prisma";
 
 const client_id = process.env.SLACK_CLIENT_ID;
-const scopes = ["commands", "users:read", "users:read.email"];
+const scopes = ["commands", "users:read", "users:read.email","chat:write.public"];
 
 export default async function handler(req: NextApiRequest, res: NextApiResponse) {
   if (!req.session?.user?.id) {