diff --git a/gdata-characteristic.js b/gdata-characteristic.js
index 8eaa9dc..79e5b1a 100644
--- a/gdata-characteristic.js
+++ b/gdata-characteristic.js
@@ -74,8 +74,14 @@ function printString(str){
   printer.cut(true, 8)
 }
 
-process.on('SIGINT', ()=>{
-	device.close()
+process.on('SIGINT', async ()=>{
+	await new Promise((resolve, reject) => {
+			device.close(()=>{
+				console.log('serial device close')
+				resolve(null)
+			})
+		})
+	process.exit(0)
 })
 
 module.exports = DataCharacteristic