diff --git a/index.js b/index.js
index 2b85316..53b95ab 100644
--- a/index.js
+++ b/index.js
@@ -18,6 +18,7 @@ child_process.exec('pinctrl set 5 op');
 child_process.exec('pinctrl set 6 op');
 child_process.exec('pinctrl set 13 op');
 child_process.exec('pinctrl set 19 op');
+child_process.exec('pinctrl set 19 pn dh');
 
 app.use('/on/:gpio', function (req, res) {