diff --git a/Resources/docker/app/Dockerfile b/Resources/docker/app/Dockerfile
index 96dd580b..2c890f22 100644
--- a/Resources/docker/app/Dockerfile
+++ b/Resources/docker/app/Dockerfile
@@ -18,5 +18,5 @@ RUN addgroup -g 1000 -S pokeapi && \
     adduser -u 1000 -S pokeapi -G pokeapi
 
 USER pokeapi
-CMD gunicorn config.wsgi:application -c gunicorn.py.ini
+CMD gunicorn config.wsgi:application -c gunicorn.conf.py
 EXPOSE 80
diff --git a/gunicorn.py.ini b/gunicorn.conf.py
similarity index 55%
rename from gunicorn.py.ini
rename to gunicorn.conf.py
index 9db1e924..bc8ebaf6 100644
--- a/gunicorn.py.ini
+++ b/gunicorn.conf.py
@@ -1,5 +1,6 @@
+import os
 from multiprocessing import cpu_count
 
-bind = '0.0.0.0:80'
+bind = "0.0.0.0:{}".format(os.environ.get("SERVER_PORT", "80"))
 workers = cpu_count() * 2
 threads = cpu_count() * 2