diff --git a/Chapter05/ArduinoSketches/02_camera_capture_qvga_rgb565.ino b/Chapter05/ArduinoSketches/02_camera_capture_qvga_rgb565.ino
index f030574..384b6b8 100644
--- a/Chapter05/ArduinoSketches/02_camera_capture_qvga_rgb565.ino
+++ b/Chapter05/ArduinoSketches/02_camera_capture_qvga_rgb565.ino
@@ -22,6 +22,8 @@ inline void rgb565_rgb888(uint8_t* in, uint8_t* out) {
 void setup() {
   Serial.begin(115600);
   while (!Serial);
+  
+  button.mode(PullUp);
 
   if (!Camera.begin(QVGA, RGB565, 1)) {
     Serial.println("Failed to initialize camera!");
diff --git a/Chapter05/ArduinoSketches/03_camera_capture_qqvga_ycbcr422.ino b/Chapter05/ArduinoSketches/03_camera_capture_qqvga_ycbcr422.ino
index d5b81a6..821046b 100644
--- a/Chapter05/ArduinoSketches/03_camera_capture_qqvga_ycbcr422.ino
+++ b/Chapter05/ArduinoSketches/03_camera_capture_qqvga_ycbcr422.ino
@@ -43,6 +43,8 @@ inline void ycbcr422_rgb888(int32_t Y, int32_t Cb, int32_t Cr, uint8_t* out) {
 void setup() {
   Serial.begin(115600);
   while (!Serial);
+	
+  button.mode(PullUp);
 
   if (!Camera.begin(QQVGA, YUV422, 1)) {
     Serial.println("Failed to initialize camera!");