diff --git a/README.md b/README.md
index 95fd65e479..9db70bd4bb 100644
--- a/README.md
+++ b/README.md
@@ -53,12 +53,13 @@ To compile AlphaRTC, please refer to the following steps
 
 1. Prerequisites
 
-   Make sure Docker is installed on your system.
+   Make sure Docker is installed on your system and add user to docker group.
 
    ``` shell
    # Install Docker
    curl -fsSL get.docker.com -o get-docker.sh
    sudo sh get-docker.sh
+   sudo usermod -aG docker ${USER}
    ```
 
 2. Clone the code
@@ -71,7 +72,7 @@ To compile AlphaRTC, please refer to the following steps
 
    ``` shell
    cd AlphaRTC
-   sudo make all
+   make all
    ```
 
    You should then be able to see two Docker images, `alphartc` and `alphartc-compile` using `sudo docker images`
diff --git a/dockers/Dockerfile.compile b/dockers/Dockerfile.compile
index 4cc112be46..e207f3339c 100644
--- a/dockers/Dockerfile.compile
+++ b/dockers/Dockerfile.compile
@@ -9,7 +9,7 @@ ARG UID
 ARG GUID
 
 RUN groupadd -f -r -g ${GUID} g${USER}
-RUN useradd ${USER} -l -u ${UID} -g ${GUID} -m -s /bin/bash
+RUN useradd ${USER} -l -u ${UID} -g ${GUID} -m -s /bin/bash || true
 
 # Download depot_tools
 ARG DEPOT_TOOLS=/opt/depot_tools