diff --git a/README.md b/README.md
index 3111901..bf4edd8 100644
--- a/README.md
+++ b/README.md
@@ -2,5 +2,5 @@
 
 1. `./generate.sh` need openssl >= 3
 2. `docker build -t postgres-mtls .`
-3. `docker-compose up -d`
-4. `psql "host=127.0.0.1 port=5432 user=postgres dbname=postgres sslmode=verify-full sslcert=certs/client.crt sslkey=certs/client.key sslrootcert=certs/ca.crt"`
+3. `docker compose up -d`
+4. `psql "host=127.0.0.1 port=15432 user=postgres dbname=postgres sslmode=verify-full sslcert=certs/client.crt sslkey=certs/client.key sslrootcert=certs/ca.crt"`
diff --git a/docker-compose.yml b/docker-compose.yml
index d70324e..4ea376c 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,10 +1,9 @@
-version: "3"
 services:
   postgres_mtls:
     image: postgres-mtls
     container_name: postgres_mtls
     ports:
-      - 5432:5432
+      - 15432:5432
     environment:
       - POSTGRES_PASSWORD=password
     volumes:
@@ -14,4 +13,5 @@ volumes:
     name: postgres_mtls
 networks:
   default:
-    name: postgres_mtls
\ No newline at end of file
+    name: postgres_mtls
+