diff --git a/Dockerfile b/Dockerfile
index 5579dadf..af6c70e0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,6 +15,7 @@ FROM ubuntu:16.04
 
 ENV DEBIAN_FRONTEND noninteractive
 ENV container docker
+ENV PORT 9000
 
 RUN apt -qq update && \
     apt -y install git \
@@ -39,7 +40,7 @@ COPY . /tmp/drydock
 WORKDIR /tmp/drydock
 RUN python3 setup.py install
 
-EXPOSE 8000
+EXPOSE $PORT
 
 ENTRYPOINT ["./entrypoint.sh"]
 
diff --git a/entrypoint.sh b/entrypoint.sh
index d6ceca38..c981906f 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -2,7 +2,7 @@
 set -ex
 
 CMD="drydock"
-PORT="8000"
+PORT=${PORT:-9000}
 
 if [ "$1" = 'server' ]; then
     exec uwsgi --http :${PORT} -w drydock_provisioner.drydock --callable drydock --enable-threads -L --pyargv "--config-file /etc/drydock/drydock.conf"