diff --git a/manual/setup_binary/installation.md b/manual/setup_binary/installation.md
index 1e6c5963..68bcddd4 100644
--- a/manual/setup_binary/installation.md
+++ b/manual/setup_binary/installation.md
@@ -391,7 +391,6 @@ nano /opt/seafile/conf/.env
     ```
 
 ```sh
-IS_PRO_VERSION=true
 JWT_PRIVATE_KEY=<Your jwt private key>
 SEAFILE_SERVER_PROTOCOL=https
 SEAFILE_SERVER_HOSTNAME=seafile.example.com