diff --git a/Dockerfile b/Dockerfile
index 8a0e1ef..6daf4c5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -34,12 +34,14 @@ RUN apt update -qq && apt install -y --no-install-recommends \
     xfonts-base \
     xfonts-75dpi \
     xfonts-100dpi \
+    x11-xserver-utils \
     && rm -rf /var/lib/apt/lists/*
 
 # VNC server
 RUN mkdir ~/.vnc
 RUN x11vnc -storepasswd 1234 ~/.vnc/passwd
-RUN echo "mwm" > ~/.xinitrc
+RUN echo "mwm &" > ~/.xinitrc
+RUN echo "xsetroot -solid grey" >> ~/.xinitrc
 RUN chmod +x ~/.xinitrc
 
 EXPOSE 5900