diff --git a/Output/pjrcUSB/arm/usb_desc.h b/Output/pjrcUSB/arm/usb_desc.h
index c85923e..30aeedd 100644
--- a/Output/pjrcUSB/arm/usb_desc.h
+++ b/Output/pjrcUSB/arm/usb_desc.h
@@ -66,7 +66,7 @@
 
 #define NKRO_KEYBOARD_INTERFACE 1 // NKRO Keyboard
 #define NKRO_KEYBOARD_ENDPOINT  2
-#define NKRO_KEYBOARD_SIZE      128
+#define NKRO_KEYBOARD_SIZE      64
 #define NKRO_KEYBOARD_INTERVAL  1
 
 #define CDC_IAD_DESCRIPTOR      1
diff --git a/Output/pjrcUSB/avr/usb_keyboard_serial.h b/Output/pjrcUSB/avr/usb_keyboard_serial.h
index 8f70827..aac7c7d 100644
--- a/Output/pjrcUSB/avr/usb_keyboard_serial.h
+++ b/Output/pjrcUSB/avr/usb_keyboard_serial.h
@@ -203,7 +203,7 @@ int8_t usb_serial_set_control(uint8_t signals); // set DSR, DCD, RI, etc
 
 #define KEYBOARD_NKRO_INTERFACE  0
 #define KEYBOARD_NKRO_ENDPOINT   1
-#define KEYBOARD_NKRO_SIZE       128
+#define KEYBOARD_NKRO_SIZE       64
 #define KEYBOARD_NKRO_HID_BUFFER EP_DOUBLE_BUFFER
 
 #define KEYBOARD_INTERFACE       1