diff --git a/mobilizon/.env b/mobilizon/.env
index 6066034..fadbbf9 100644
--- a/mobilizon/.env
+++ b/mobilizon/.env
@@ -12,7 +12,7 @@ COMPOSE_FILE=${SERVICES_DIR}/mobilizon/docker-compose.yml:${SERVICES_DIR}/mobili
 
 MOBILIZON_INSTANCE_NAME="RésiLien - Mobilizon"
 MOBILIZON_DOMAIN=mobilizon.lan
-MOBILIZON_INSTANCE_PORT=4000
+#MOBILIZON_INSTANCE_PORT=4000
 MOBILIZON_INSTANCE_EMAIL=no-reply@mobilizon.lan
 
 MOBILIZON_REPLY_EMAIL=contact@mobilizon.lan
diff --git a/mobilizon/docker-compose.local.yml b/mobilizon/docker-compose.local.yml
index 156150e..4cd53ce 100644
--- a/mobilizon/docker-compose.local.yml
+++ b/mobilizon/docker-compose.local.yml
@@ -5,4 +5,4 @@ version: "3.8"
 services:
   mobilizon:
     ports:
-      - "4000:${MOBILIZON_PORT:-4000}"
+      - "${MOBILIZON_INSTANCE_PORT:-4000}:${MOBILIZON_PORT:-4000}"
diff --git a/mobilizon/docker-compose.yml b/mobilizon/docker-compose.yml
index 3f55e57..e7f5c41 100644
--- a/mobilizon/docker-compose.yml
+++ b/mobilizon/docker-compose.yml
@@ -21,7 +21,7 @@ services:
     environment:
       MOBILIZON_INSTANCE_NAME: ${MOBILIZON_INSTANCE_NAME}
       MOBILIZON_INSTANCE_HOST: ${MOBILIZON_DOMAIN}
-      MOBILIZON_INSTANCE_PORT: ${MOBILIZON_INSTANCE_PORT}
+      MOBILIZON_INSTANCE_PORT: ${MOBILIZON_INSTANCE_PORT:-4000}
       MOBILIZON_INSTANCE_EMAIL: ${MOBILIZON_INSTANCE_EMAIL}
 
       MOBILIZON_REPLY_EMAIL: ${MOBILIZON_REPLY_EMAIL}