diff --git a/deployment/docker-compose.yaml b/deployment/docker-compose.yaml
index 367ea9d..04c3834 100644
--- a/deployment/docker-compose.yaml
+++ b/deployment/docker-compose.yaml
@@ -1,8 +1,9 @@
+version: '3'
 services:
   postgres:
     image: postgres
     ports:
-      - 5432:5432
+      - "5432:5432"
     restart: always
 
     volumes: