--- a/compose3/preview/usps.yml	Fri Apr 21 20:42:58 2017 +0100
+++ b/compose3/preview/usps.yml	Mon Apr 24 15:20:17 2017 +0100
@@ -1,5 +1,5 @@
-# base compose file for usps Release Candidate release
-version: "2"
+# base compose file for usps Preview release
+version: "3"
 services:
   uspsdb:
     restart: unless-stopped
@@ -7,7 +7,7 @@
     environment:
       - DB_NAME=uspsdb
       - DB_USER=usps
-      - DB_PASS=uspsdefault
+      - DB_PASS=${USPS_DB_PASSWORD:-uspsdefault}
   uspsapp:
     restart: unless-stopped
     image: docker.ssdt.io/usps-app:preview
@@ -15,6 +15,6 @@
       - DB_HOST=uspsdb
       - DB_NAME=uspsdb
       - DB_USER=usps
-      - DB_PASS=uspsdefault
+      - DB_PASS=${USPS_DB_PASSWORD:-uspsdefault}
       - USPS_MODULE_USASINTEGRATION_CONFIGURATION_USASCONFIGURATION_SERVERHOST=usasapp
       - USPS_MODULE_USASINTEGRATION_CONFIGURATION_USASCONFIGURATION_SERVERDNSLOOKUP=true