diff --git a/Dockerfile b/Dockerfile
index 9148430c..00fcfc7f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,4 +7,7 @@ RUN npm install
 
 COPY src /usr/src
 
+ENV PORT=80
+EXPOSE 80
+
 CMD ["node", "index.js"]
diff --git a/docker-compose.yml b/docker-compose.yml
index a42f59c8..23ceb235 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -9,11 +9,8 @@ services:
       - TOTP_SECRET=GRWGIJS6IRHVEODVNRCXCOBMJ5AGC6ZE
       - JWT_SECRET=unsecure_secret
       - JWT_EXPIRATION_TIME=1h
-      - PORT=80
     depends_on:
       - ldap
-    expose:
-      - "80"
     restart: always
 
   ldap: