diff --git a/Makefile b/Makefile
index 8f48763..ff085a9 100644
--- a/Makefile
+++ b/Makefile
@@ -22,7 +22,9 @@ update_secrets_sample:
 	@sed -i "s/telegram_monster_chat:.*/telegram_monster_chat: 0/g" hass/settings/secrets.yaml.sample #must be valid
 	@sed -i "s/purifier_key:.*/purifier_key: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/g" hass/settings/secrets.yaml.sample #must be valid
 	@sed -i "s/philips_downlight_token:.*/philips_downlight_token: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/g" hass/settings/secrets.yaml.sample #must be valid
-	
+	@sed -i "s/modbus_host:.*/modbus_host: modbus.host/g" hass/settings/secrets.yaml.sample #must be valid
+	@sed -i "s/modbus_port:.*/modbus_port: 9977/g" hass/settings/secrets.yaml.sample #must be valid
+
 	@echo "Masking env files..."
 	@find . -name *.env | xargs -I{} cp {} {}.sample
 	@find . -name *.env.sample | xargs -I{} sed -i "s/\=.*/\=xxxxxxxxx/g" {}
diff --git a/hass/settings/secrets.yaml.sample b/hass/settings/secrets.yaml.sample
index b6ab603..fbf08aa 100644
--- a/hass/settings/secrets.yaml.sample
+++ b/hass/settings/secrets.yaml.sample
@@ -6,8 +6,8 @@ timezone: Europe/London
 base_url: xxxxxxxxx
 base_host: xxxxxxxxx
 base_localname: xxxxxxxxx
-modbus_host: xxxxxxxxx
-modbus_port: xxxxxxxxx
+modbus_host: modbus.host
+modbus_port: 9977
 modbus_admin_pass: xxxxxxxxx
 
 mysensors_gateway_ip: xxxxxxxxx