diff --git a/Dockerfile b/Dockerfile
index f830042..b1378ef 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,15 +1,18 @@
 FROM python:3.7-slim-buster
+#FROM python:3.7-alpine
 
 COPY entrypoint /entrypoint
 
 RUN useradd -u 54000 radio && \
-        apt update && \
-        apt install -y git gcc && \
+        apt-get update && \
+        apt-get install -y git gcc && \
         cd /opt && \
         git clone https://github.com/hacknix/freedmr && \
         cd freedmr && \
         pip install --no-cache-dir -r requirements.txt && \
-        apt autoremove -y git gcc && \
+        apt-get purge  -y git gcc libx11-6 && \
+	apt-get clean -y && \
+	apt-get autoremove -y && \
         rm -rf /var/lib/apt/lists/* && \
         chown -R radio: /opt/freedmr
 
diff --git a/README.md b/README.md
index 4bdb96c..d696755 100755
--- a/README.md
+++ b/README.md
@@ -49,7 +49,7 @@ Start your container, passing your configuration file.
 
 ```bash
 cfg_file="/absolute/path/to/cfg/file"
-docker run -v $cfg_file:/opt/freedmr/hblink.cfg -p 54000:54000 freedmr
+docker run -v $cfg_file:/opt/freedmr/hblink.cfg -p 54000-54020:54000-54020/udp freedmr
 ```
 
 Note that `$cfg_file` is used by the container's 'radio' user internally, so you may need to modify file permissions.