diff --git a/lib/app.js b/lib/app.js
index <HASH>..<HASH> 100644
--- a/lib/app.js
+++ b/lib/app.js
@@ -71,7 +71,11 @@ var makeApp = function(configBase, callback) {
             serializers: {
                 req: Logger.stdSerializers.req,
                 res: Logger.stdSerializers.res,
-                err: Logger.stdSerializers.err,
+                err: function(err) {
+                    var obj = Logger.stdSerializers.err(err);
+                    // only show properties without an initial underscore
+                    return _.pick(obj, _.filter(_.keys(obj), function(key) { return key[0] != "_"; }));                    
+                },
                 principal: function(principal) {
                     if (principal) {
                         return {id: principal.id, type: principal.objectType};
Filter underscored elements from err output