diff --git a/Dump.py b/Dump.py
old mode 100755
new mode 100644
index 49e6122..ba7333a
--- a/Dump.py
+++ b/Dump.py
@@ -1,3 +1,6 @@
+#!/usr/bin/env python
+# -*- coding: utf8 -*-
+
 import RPi.GPIO as GPIO
 import MFRC522
 import signal
diff --git a/MFRC522.py b/MFRC522.py
old mode 100755
new mode 100644
index 30575bf..6f157c2
--- a/MFRC522.py
+++ b/MFRC522.py
@@ -1,3 +1,6 @@
+#!/usr/bin/env python
+# -*- coding: utf8 -*-
+
 import RPi.GPIO as GPIO
 import spi
 import signal
@@ -104,8 +107,8 @@ class MFRC522:
     
   serNum = []
   
-  def __init__(self,spd=1000000):
-    spi.openSPI(speed=spd)
+  def __init__(self, dev='/dev/spidev0.0', spd=1000000):
+    spi.openSPI(device=dev,speed=spd)
     GPIO.setmode(GPIO.BOARD)
     GPIO.setup(22, GPIO.OUT)
     GPIO.output(self.NRSTPD, 1)
@@ -114,10 +117,10 @@ class MFRC522:
   def MFRC522_Reset(self):
     self.Write_MFRC522(self.CommandReg, self.PCD_RESETPHASE)
   
-  def Write_MFRC522(self,addr,val):
+  def Write_MFRC522(self, addr, val):
     spi.transfer(((addr<<1)&0x7E,val))
   
-  def Read_MFRC522(self,addr):
+  def Read_MFRC522(self, addr):
     val = spi.transfer((((addr<<1)&0x7E) | 0x80,0))
     return val[1]
   
@@ -390,4 +393,4 @@ class MFRC522:
     
     self.Write_MFRC522(self.TxAutoReg, 0x40)
     self.Write_MFRC522(self.ModeReg, 0x3D)
-    self.AntennaOn()
\ No newline at end of file
+    self.AntennaOn()
diff --git a/Read.py b/Read.py
old mode 100755
new mode 100644
index 4e5b139..c90e213
--- a/Read.py
+++ b/Read.py
@@ -1,3 +1,6 @@
+#!/usr/bin/env python
+# -*- coding: utf8 -*-
+
 import RPi.GPIO as GPIO
 import MFRC522
 import signal
diff --git a/Write.py b/Write.py
old mode 100755
new mode 100644
index 154da67..d754463
--- a/Write.py
+++ b/Write.py
@@ -1,3 +1,6 @@
+#!/usr/bin/env python
+# -*- coding: utf8 -*-
+
 import RPi.GPIO as GPIO
 import MFRC522
 import signal