diff --git a/Dockerfile b/Dockerfile
index 99025c6..dab6495 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,7 +9,7 @@ RUN wget http://fpdownload.macromedia.com/get/flashplayer/pdc/11.2.202.635/insta
 && mkdir -p ~/.mozilla/plugins/ \
 && cp flash_player/libflashplayer.so ~/.mozilla/plugins/ \
 && rm -rf flash_player install_flash_player_11_linux.x86_64.tar.gz /tmp/.X11-unix/*
-RUN echo "xiaosong:xiaosong" | /usr/bin/vncserver
+RUN echo "xiaosong" | /usr/bin/vncpasswd -f
 ADD ./conf/vncserver@:1.service /lib/systemd/system/vncserver@:1.service
 ADD ./conf/xstartup /root/.vnc/xstartup
 RUN systemctl enable vncserver@:1.service \