diff --git a/zabbix/docker-compose.yml b/zabbix/docker-compose.yml
index 466a44f..429b9db 100644
--- a/zabbix/docker-compose.yml
+++ b/zabbix/docker-compose.yml
@@ -26,6 +26,7 @@ services:
       POSTGRES_USER: zabbix_user
       POSTGRES_PASSWORD: TheVeryVeryBigzabbixPassw0rd_TobeReallyAndTotallySafe
       POSTGRES_DB: zabbix_db
+      DB_SERVER_HOST: postgresql-server
       ZBX_HISTORYSTORAGETYPES: log,text #Zabbix configuration variables
       ZBX_DEBUGLEVEL: 1
       ZBX_HOUSEKEEPINGFREQUENCY: 1