diff --git a/WaveshareUARTFingerprintSensor/FingerprintSensor.cs b/WaveshareUARTFingerprintSensor/FingerprintSensor.cs
index c4004ba..8df74d7 100644
--- a/WaveshareUARTFingerprintSensor/FingerprintSensor.cs
+++ b/WaveshareUARTFingerprintSensor/FingerprintSensor.cs
@@ -166,6 +166,9 @@ namespace WaveshareUARTFingerprintSensor
 
         private byte[] ReadData(int length)
         {
+            // Needed to work
+            Thread.Sleep(150);
+
             byte first = (byte)_serialPort.ReadByte();
 
             if (first != PacketSeparator)