diff --git a/Dockerfile b/Dockerfile
index 0807138..b2a562e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,8 +3,9 @@
 # 9001 - websocketify
 # 5901 - tigervnc
 
-# based on ubuntu 16.04 LTS
-FROM ubuntu:xenial
+# based on ubuntu 18.04 LTS
+FROM ubuntu:18.04
+
 # 各种环境变量
 ENV LANG=en_US.UTF-8 \
     LC_ALL=en_US.UTF-8 \
@@ -22,14 +23,16 @@ RUN groupadd user && useradd -m -g user user && \
     apt-get install -y \
         git \
         ca-certificates wget locales \
-        nginx \
-        xorg openbox && \
+        nginx sudo \
+        xorg openbox python-numpy rxvt-unicode && \
     wget -O - https://github.com/just-containers/s6-overlay/releases/download/v1.22.1.0/s6-overlay-amd64.tar.gz | tar -xzv && \
     # workaround for https://github.com/just-containers/s6-overlay/issues/158
     ln -s /init /init.entrypoint && \
     # tigervnc
-    wget -O /tmp/tigervnc.deb https://bintray.com/artifact/download/tigervnc/stable/ubuntu-16.04LTS/amd64/tigervncserver_1.9.0-1ubuntu1_amd64.deb && \
-    (dpkg -i /tmp/tigervnc.deb || apt-get -f -y install) && \
+    wget -O /tmp/tigervnc.tar.gz https://bintray.com/tigervnc/stable/download_file?file_path=tigervnc-1.10.1.x86_64.tar.gz && \
+    tar xzf /tmp/tigervnc.tar.gz -C /tmp && \
+    chown root:root -R /tmp/tigervnc-1.10.1.x86_64 && \
+    tar c -C /tmp/tigervnc-1.10.1.x86_64 usr | tar x -C / && \
     locale-gen en_US.UTF-8 && \
     # novnc
     mkdir -p /app/src && \
@@ -38,7 +41,7 @@ RUN groupadd user && useradd -m -g user user && \
     apt-get purge -y git wget && \
     apt-get autoremove -y && \
     apt-get clean && \
-    rm -fr /tmp/* /app/src/novnc/.git /app/src/websockify/.git
+    rm -fr /tmp/* /app/src/novnc/.git /app/src/websockify/.git /var/lib/apt/lists
 
 # copy files
 COPY ./docker-root /
diff --git a/docker-root/etc/X11/Xvnc-session b/docker-root/etc/X11/Xvnc-session
new file mode 100755
index 0000000..ea1a5d1
--- /dev/null
+++ b/docker-root/etc/X11/Xvnc-session
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+test x"$SHELL" = x"" && SHELL=/bin/bash
+test x"$1"     = x"" && set -- default
+
+vncconfig -nowin &
+$SHELL -l <<EOF
+exec /etc/X11/Xsession "$@"
+EOF
+vncserver -kill $DISPLAY
diff --git a/docker-root/etc/services.d/tigervnc/run b/docker-root/etc/services.d/tigervnc/run
index da0f1e1..186c6df 100755
--- a/docker-root/etc/services.d/tigervnc/run
+++ b/docker-root/etc/services.d/tigervnc/run
@@ -1,2 +1,2 @@
 #!/usr/bin/with-contenv bash
-sudo -Hu user /usr/bin/vncserver :11 -fg -geometry $VNC_GEOMETRY -depth 24
\ No newline at end of file
+sudo -Hu user /usr/bin/vncserver :11 -fg -geometry $VNC_GEOMETRY -depth 24