diff --git a/odoo/README.md b/odoo/README.md
index ec55c07eb..82f8b5e85 100644
--- a/odoo/README.md
+++ b/odoo/README.md
@@ -24,7 +24,7 @@ This image requires a running PostgreSQL server.
 ## Start a PostgreSQL server
 
 ```console
-$ docker run -d -e POSTGRES_USER=odoo -e POSTGRES_PASSWORD=odoo --name db postgres
+$ docker run -d -e POSTGRES_USER=odoo -e POSTGRES_PASSWORD=odoo --name db postgres:9.4
 ```
 
 ## Start an Odoo instance