diff --git a/bin/disinto b/bin/disinto
index c6e53f3..b111bf9 100755
--- a/bin/disinto
+++ b/bin/disinto
@@ -167,6 +167,7 @@ services:
       FORGEJO__database__DB_TYPE: sqlite3
       FORGEJO__server__ROOT_URL: http://forgejo:3000/
       FORGEJO__server__HTTP_PORT: "3000"
+      FORGEJO__security__INSTALL_LOCK: "true"
       FORGEJO__service__DISABLE_REGISTRATION: "true"
     networks:
       - disinto-net