diff --git a/Dockerfile b/Dockerfile
index 75838e61..1a8fb790 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -22,5 +22,6 @@ RUN rm -rf ./test
 RUN rm -rf ./src
 RUN chmod +x start-homolog.sh
 
+EXPOSE 80
 
 ENTRYPOINT ["./start-homolog.sh"]
diff --git a/express-prod-server.js b/express-prod-server.js
index ee263eb2..63a4c75d 100644
--- a/express-prod-server.js
+++ b/express-prod-server.js
@@ -1,7 +1,7 @@
 const express = require('express');
 
 const app = express();
-const port = process.env.PORT || 5000;
+const port = process.env.PORT || 80;
 const router = express.Router();
 
 app.use(express.static(`${__dirname}/dist`));