How to configure express.js/jade to process html files?

I would like to configure jade engine to handle .html files in my views folder. Here is my currentserver configuration:

app.configure(function(){
  var pub_dir = __dirname + '/public';
  app.set('port', process.env.PORT || 3000);
  app.set('views', __dirname + '/views');
  app.set('view engine', 'jade');
  app.use(express.bodyParser());
  app.use(express.methodOverride());
  app.use(express.cookieParser());
  app.use(express.session({ secret: nconf.get("site:secret") }));
  app.use(everyauth.middleware());  
  app.use(require('less-middleware')({ src: pub_dir, force:true }));
  app.use(express.static(pub_dir)); 
  app.use(app.router);
  app.use(logErrors);
  app.use(clientErrorHandler);
  app.use(errorHandler);
});