diff --git a/defaults/main.yml b/defaults/main.yml
index 9bdc731..4c07e4c 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -3,4 +3,5 @@
 postgres_password: t0t4l!S3cur1tY.
 postgres_data_folder: ./psql_data
 postgres_version: alpine
+postgres_external_port: 5432
 compose_dir: /srv
diff --git a/templates/docker-compose.yml.j2 b/templates/docker-compose.yml.j2
index 83d9f7c..5b5ef88 100644
--- a/templates/docker-compose.yml.j2
+++ b/templates/docker-compose.yml.j2
@@ -12,6 +12,8 @@ services:
       POSTGRES_PASSWORD: {{ postgres_password }}
     volumes:
       - {{ postgres_data_folder }}:/var/lib/postgresql/data
+    ports:
+      - {{ postgres_external_port }}:5432
 
   adminer:
     image: adminer