diff --git a/lib/railway.js b/lib/railway.js
index 14503229..2d014a81 100644
--- a/lib/railway.js
+++ b/lib/railway.js
@@ -30,7 +30,11 @@ module.exports = function init(root) {
     try {
         var cf = require(confFile);
         if (cf instanceof Array) cf = cf[0];
-        config = cf[app.set('env')];
+        if (typeof cs === 'function') {
+            config = cs(railway);
+        } else {
+            config = cf[app.set('env')];
+        }
     } catch (e) {
         console.log('Could not load config/database.{js|json|yml}');
         throw e;