diff --git a/Dockerfile b/Dockerfile
index fd07264..47ae737 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
-FROM ubuntu:18.04
+FROM ubuntu:20.04
 
 # ARGUMENTS
-ARG SDK_MANAGER_VERSION=1.8.0-10363
+ARG SDK_MANAGER_VERSION=1.9.1-10844
 ARG SDK_MANAGER_DEB=sdkmanager_${SDK_MANAGER_VERSION}_amd64.deb
 ARG GID=1000
 ARG UID=1000
@@ -21,6 +21,8 @@ RUN useradd -m $USERNAME && \
         groupmod --gid ${GID} $USERNAME
 
 # install package
+RUN echo "Acquire::GzipIndexes \"false\"; Acquire::CompressionTypes::Order:: \"gz\";" > /etc/apt/apt.conf.d/docker-gzip-indexes
+ENV DEBIAN_FRONTEND noninteractive
 RUN yes | unminimize && \
     apt-get update && apt-get install -y --no-install-recommends \
         build-essential \
@@ -42,10 +44,23 @@ RUN yes | unminimize && \
         net-tools \
         python \
         sshpass \
-        chromium-browser \
         qemu-user-static \
         binfmt-support \
         libxshmfence1 \
+        tzdata \
+        locales \
+        sudo \
+        wget \
+        ca-certificates \
+        && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
+# install Google Chrome
+RUN sh -c 'echo "deb http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google-chrome.list'
+RUN wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add -
+RUN apt-get update && apt-get install -y --no-install-recommends \
+        google-chrome-stable \
         && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/*
@@ -56,8 +71,6 @@ ENV LANG en_US.UTF-8
 ENV LANGUAGE en_US:en
 ENV LC_ALL en_US.UTF-8
 
-RUN echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections
-
 # install SDK Manager
 USER jetpack
 COPY --chown=jetpack:jetpack ${SDK_MANAGER_DEB} /home/${USERNAME}/
diff --git a/README.md b/README.md
index 0eb1cd8..cf05a18 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ NVIDIA released official Docker image(<https://docs.nvidia.com/sdk-manager/docke
 
 Please download the package of NVIDIA SDK Manager from <https://developer.nvidia.com/nvidia-sdk-manager>.  
 And, please put the package of NVIDIA SDK Manager in the same directory as the Dockerfile.  
-This time, I used `sdkmanager_1.8.0-10363_amd64.deb`.
+This time, I used `sdkmanager_1.9.1-10844_amd64.deb`.
 
 ### Build Docker image
 
@@ -29,7 +29,7 @@ docker build --build-arg GID=$(id -g) --build-arg UID=$(id -u) -t jetpack .
 To build a Docker image with a specific SDK Manager version override the ``SDK_MANAGER_VERSION`` variable in the Docker command line
 
 ```
-docker build --build-arg SDK_MANAGER_VERSION=1.8.0-10363 --build-arg GID=$(id -g) --build-arg UID=$(id -u) -t jetpack .
+docker build --build-arg SDK_MANAGER_VERSION=1.9.1-10844 --build-arg GID=$(id -g) --build-arg UID=$(id -u) -t jetpack .
 ```
 
 ### Create Docker container