diff --git a/docker/Emulator_x86 b/docker/Emulator_x86
index 9f3df53..2f4860a 100644
--- a/docker/Emulator_x86
+++ b/docker/Emulator_x86
@@ -21,6 +21,7 @@ WORKDIR /root
 #------------------
 # x11vnc
 #   VNC server for X display
+#       We use package from ubuntu 18.10 to fix crashing issue
 # openbox
 #   Windows manager
 # menu
@@ -46,6 +47,8 @@ WORKDIR /root
 # ubuntu-vm-builder
 # bridge-utils
 #==================
+ADD ./sources1810.list /etc/sources.list.d/
+ADD ./x11vnc.pref /etc/apt/preferences.d/
 RUN apt-get -qqy update && apt-get -qqy install --no-install-recommends \
     xterm \
     supervisor \
diff --git a/docker/sources1810.list b/docker/sources1810.list
new file mode 100644
index 0000000..97d0772
--- /dev/null
+++ b/docker/sources1810.list
@@ -0,0 +1,2 @@
+deb http://mirror.servers.com/ubuntu/ cosmic main restricted universe 
+deb http://security.ubuntu.com/ubuntu/ cosmic-security main restricted universe
diff --git a/docker/x11vnc.pref b/docker/x11vnc.pref
new file mode 100644
index 0000000..54da167
--- /dev/null
+++ b/docker/x11vnc.pref
@@ -0,0 +1,9 @@
+Package: *
+Pin: release n=bionic
+Pin-Priority: -10
+Package: x11vnc
+Pin: release n=cosmic
+Pin-Priority: 500
+Package: x11vnc-data
+Pin: release n=cosmic
+Pin-Priority: 500
\ No newline at end of file
diff --git a/release.sh b/release.sh
index 8be68ce..a09f538 100755
--- a/release.sh
+++ b/release.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 # Bash version should >= 4 to be able to run this script.
 
-IMAGE="budtmo/docker-android"
+IMAGE="$DOCKER_ORG/docker-android"
 
 if [ -z "$1" ]; then
     read -p "Task (test|build|push|all) : " TASK