diff --git a/lib/app.js b/lib/app.js
index 6952fd5f22..487f5a7899 100644
--- a/lib/app.js
+++ b/lib/app.js
@@ -20,7 +20,7 @@ module.exports = function(config) {
 
     const baseUriPath = config.baseUriPath || '';
 
-    app.set('trust proxy');
+    app.set('trust proxy', true);
     app.disable('x-powered-by');
     app.set('port', config.port);
     app.locals.baseUriPath = baseUriPath;