diff --git a/README.md b/README.md
index 8ed3532..6181738 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ npm start
 
 ## UDP Controls
 
-Dotgrid can be controlled by UDP via the port `49160`. It expects messages up to 6 characters.
+Dotgrid can be controlled by UDP via the port `49161`. It expects messages up to 6 characters.
 
 - **layer** `0/1/2`
 - **type** `l/c/r/z` (`l`:line, `c`:clock-wise arc, `r`: cc-wise arc, `z`: close, `.`:clear, `*`: draw)
diff --git a/desktop/sources/scripts/listener.js b/desktop/sources/scripts/listener.js
index c7bdead..2c5e815 100644
--- a/desktop/sources/scripts/listener.js
+++ b/desktop/sources/scripts/listener.js
@@ -28,11 +28,11 @@ function Listener (dotgrid) {
   }
 
   function draw () {
-    dotgrid.renderer.update()
+    dotgrid.renderer.update(true)
   }
 
   function parse (msg) {
-    if (msg === '') {
+    if (msg === '' || msg === '*') {
       return draw()
     }
     if (['0', '1', '2'].indexOf(msg) > -1) {
@@ -65,5 +65,5 @@ function Listener (dotgrid) {
     server.close()
   })
 
-  this.server.bind(49160)
+  this.server.bind(49161)
 }