diff --git a/AfRApay.MateCard/src/readers/pn532.cpp b/AfRApay.MateCard/src/readers/pn532.cpp
index bd76517..5ec39a8 100644
--- a/AfRApay.MateCard/src/readers/pn532.cpp
+++ b/AfRApay.MateCard/src/readers/pn532.cpp
@@ -44,7 +44,8 @@ void PN532Reader::cycleMode() {
 }
 
 void PN532Reader::end() {
-	pn532->sendCommandCheckAck(new byte[1]{PN532_COMMAND_POWERDOWN}, 1, 1);
+	// Power down but allow wakeups from I2C and SPI
+	pn532->sendCommandCheckAck(new byte[2]{PN532_COMMAND_POWERDOWN, 0b10100000}, 2, 1);
 }
 
 bool PN532Reader::isNewCardPresent() {