diff --git a/Dockerfile b/Dockerfile
index 2ba926a..f2cb63e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,7 +17,7 @@ ARG GATEWAY_PORT=5001
 ARG SERVER_PORT=5002
 ARG PORTAL_PORT=5003
 EXPOSE $GATEWAY_PORT $SERVER_PORT $PORTAL_PORT
-CMD ["sh", "-c", "java -jar /app/brainwine.jar --disablegui"]
+CMD ["sh", "-c", "java -jar /app/brainwine.jar disablegui"]
 
 LABEL org.opencontainers.image.title="Brainwine"
 LABEL org.opencontainers.image.description=" A portable private server for Deepworld."