diff --git a/Dockerfile b/Dockerfile
index 71c22b5..bbcabd3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,9 @@
-FROM ubuntu:14.04.2
+FROM ubuntu:14.04.3
 MAINTAINER Doro Wu <fcwu.tw@gmail.com>
 
+# cache
+RUN sed -i 's#http://archive.ubuntu.com/#http://qnap.dorowu.com/#' /etc/apt/sources.list
+
 ENV DEBIAN_FRONTEND noninteractive
 ENV HOME /root
 
@@ -30,6 +33,7 @@ ADD noVNC /noVNC/
 ADD nginx.conf /etc/nginx/sites-enabled/default
 ADD startup.sh /
 ADD supervisord.conf /etc/supervisor/conf.d/
+ADD doro-lxde-wallpapers /usr/share/doro-lxde-wallpapers/
 
 EXPOSE 6080
 WORKDIR /root
diff --git a/doro-lxde-wallpapers/bg1.jpg b/doro-lxde-wallpapers/bg1.jpg
new file mode 100644
index 0000000..170e1b2
Binary files /dev/null and b/doro-lxde-wallpapers/bg1.jpg differ
diff --git a/doro-lxde-wallpapers/bg2.jpg b/doro-lxde-wallpapers/bg2.jpg
new file mode 100644
index 0000000..1c38c13
Binary files /dev/null and b/doro-lxde-wallpapers/bg2.jpg differ
diff --git a/doro-lxde-wallpapers/bg3.jpg b/doro-lxde-wallpapers/bg3.jpg
new file mode 100644
index 0000000..41f8280
Binary files /dev/null and b/doro-lxde-wallpapers/bg3.jpg differ
diff --git a/doro-lxde-wallpapers/bg4.jpg b/doro-lxde-wallpapers/bg4.jpg
new file mode 100644
index 0000000..2230f60
Binary files /dev/null and b/doro-lxde-wallpapers/bg4.jpg differ
diff --git a/doro-lxde-wallpapers/desktop-items-0.conf b/doro-lxde-wallpapers/desktop-items-0.conf
new file mode 100644
index 0000000..e61bd49
--- /dev/null
+++ b/doro-lxde-wallpapers/desktop-items-0.conf
@@ -0,0 +1,18 @@
+[*]
+wallpaper_mode=stretch
+wallpaper_common=0
+wallpapers_configured=4
+wallpaper0=/usr/share/doro-lxde-wallpapers/bg1.jpg
+wallpaper1=/usr/share/doro-lxde-wallpapers/bg2.jpg
+wallpaper2=/usr/share/doro-lxde-wallpapers/bg3.jpg
+wallpaper3=/usr/share/doro-lxde-wallpapers/bg4.jpg
+desktop_bg=#000000
+desktop_fg=#ffffff
+desktop_shadow=#000000
+desktop_font=Sans 12
+show_wm_menu=0
+sort=mtime;ascending;mingle;
+show_documents=0
+show_trash=0
+show_mounts=0
+
diff --git a/startup.sh b/startup.sh
index 3580a77..83eb099 100755
--- a/startup.sh
+++ b/startup.sh
@@ -8,6 +8,8 @@ PASS=ubuntu
 # echo "Username: ubuntu Password: $PASS"
 id -u ubuntu &>/dev/null || useradd --create-home --shell /bin/bash --user-group --groups adm,sudo ubuntu
 echo "ubuntu:$PASS" | chpasswd
+sudo -u ubuntu -i bash -c "mkdir -p /home/ubuntu/.config/pcmanfm/LXDE/ \
+    && cp /usr/share/doro-lxde-wallpapers/desktop-items-0.conf /home/ubuntu/.config/pcmanfm/LXDE/"
 
 cd /web && ./run.py > /var/log/web.log 2>&1 &
 nginx -c /etc/nginx/nginx.conf