diff --git a/Dockerfile b/Dockerfile
index 09d12b3..7f6e5f2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -168,7 +168,7 @@
 # (2-2) Optional vulkan support
 # vulkan-utils includes vulkan-smoketest, benchmark software of vulkan API
 RUN apt-get update && apt-get install -y --no-install-recommends \
-        libvulkan1 vulkan-utils && \
+        vulkan-utils && \
     rm -rf /var/lib/apt/lists/*
 
 # for test
@@ -194,8 +194,7 @@
 # related? https://github.com/Microsoft/WSL/issues/2016
 RUN apt-get update && apt-get install -y --no-install-recommends \
       dbus-x11 \
-      libdbus-c++-1-0v5 \
-      software-properties-common && \
+      libdbus-c++-1-0v5 && \
     rm -rf /var/lib/apt/lists/*
 
 # (3) Run Xorg server + x11vnc + X applications
diff --git a/run.sh b/run.sh
index 7b743ee..9066d76 100755
--- a/run.sh
+++ b/run.sh
@@ -23,7 +23,7 @@
 /noVNC-1.2.0/utils/launch.sh --vnc localhost:5900 --listen 8081 &
 sleep 2
 
-echo 'running noVNC at http://localhost:8081/vnc.html?host=localhost&port=8081'
+echo 'running noVNC at http://docker_ip:6080/vnc_lite.html'
 
 # 3. start simulator
 export DISPLAY=:0