diff --git a/automation/vars/main.yml b/automation/vars/main.yml
index 9646c72ca..06b3e1559 100644
--- a/automation/vars/main.yml
+++ b/automation/vars/main.yml
@@ -173,7 +173,7 @@ consul_services:
 
 
 # PostgreSQL variables
-postgresql_version: 16
+postgresql_version: "16"
 # postgresql_data_dir: see vars/Debian.yml or vars/RedHat.yml
 postgresql_listen_addr: "0.0.0.0" # Listen on all interfaces. Or use "{{ inventory_hostname }},127.0.0.1" to listen on a specific IP address.
 postgresql_port: 5432