diff --git a/Dump.py b/Dump.py
index be825b1..3b528e4 100644
--- a/Dump.py
+++ b/Dump.py
@@ -57,7 +57,7 @@ while continue_reading:
     if status == MIFAREReader.MI_OK:
 
         # Print UID
-        print "Card read UID: "+str(uid[0])+","+str(uid[1])+","+str(uid[2])+","+str(uid[3])
+        print "Card read UID: %s,%s,%s,%s" % (uid[0], uid[1], uid[2], uid[3])
     
         # This is the default key for authentication
         key = [0xFF,0xFF,0xFF,0xFF,0xFF,0xFF]
diff --git a/MFRC522.py b/MFRC522.py
index 53f9859..441482a 100644
--- a/MFRC522.py
+++ b/MFRC522.py
@@ -373,7 +373,7 @@ class MFRC522:
     if not(status == self.MI_OK) or not(backLen == 4) or not((backData[0] & 0x0F) == 0x0A):
         status = self.MI_ERR
     
-    print str(backLen)+" backdata &0x0F == 0x0A "+str(backData[0]&0x0F)
+    print "%s backdata &0x0F == 0x0A %s" % (backLen, backData[0]&0x0F)
     if status == self.MI_OK:
         i = 0
         buf = []
diff --git a/README.md b/README.md
index a99d869..1b3150a 100644
--- a/README.md
+++ b/README.md
@@ -1,26 +1,24 @@
 MFRC522-python
 ==============
-
 A small class to interface with the NFC reader Module MFRC522 on the Raspberry Pi.
-
 This is a Python port of the example code for the NFC module MF522-AN.
 
 **Important notice:** This library has not being actively updated in almost four years.
 It might not work as intended on more recent Raspberry Pi devices. You might want to 
 take a look to the open pull-requests and forks to see other implementations and bug-fixes.
 
-# Requirements
+## Requirements
 This code requires you to have SPI-Py installed from the following repository:
 https://github.com/lthiery/SPI-Py
 
-# Examples
+## Examples
 This repository includes a couple of examples showing how to read, write, and dump data from a chip. They are thoroughly commented, and should be easy to understand.
 
-#  Pins
+## Pins
 You can use [this](http://i.imgur.com/y7Fnvhq.png) image for reference.
 
 | Name | Pin # | Pin name   |
-|------|-------|------------|
+|:------:|:-------:|:------------:|
 | SDA  | 24    | GPIO8      |
 | SCK  | 23    | GPIO11     |
 | MOSI | 19    | GPIO10     |
@@ -30,8 +28,8 @@ You can use [this](http://i.imgur.com/y7Fnvhq.png) image for reference.
 | RST  | 22    | GPIO25     |
 | 3.3V | 1     | 3V3        |
 
-# Usage
+## Usage
 Import the class by importing MFRC522 in the top of your script. For more info see the examples.
 
-# License
+## License
 This code and examples are licensed under the GNU Lesser General Public License 3.0.
diff --git a/Read.py b/Read.py
index e91d49e..cc395c5 100644
--- a/Read.py
+++ b/Read.py
@@ -61,7 +61,7 @@ while continue_reading:
     if status == MIFAREReader.MI_OK:
 
         # Print UID
-        print "Card read UID: "+str(uid[0])+","+str(uid[1])+","+str(uid[2])+","+str(uid[3])
+        print "Card read UID: %s,%s,%s,%s" % (uid[0], uid[1], uid[2], uid[3])
     
         # This is the default key for authentication
         key = [0xFF,0xFF,0xFF,0xFF,0xFF,0xFF]
diff --git a/Write.py b/Write.py
index e378897..237e268 100644
--- a/Write.py
+++ b/Write.py
@@ -57,7 +57,7 @@ while continue_reading:
     if status == MIFAREReader.MI_OK:
 
         # Print UID
-        print "Card read UID: "+str(uid[0])+","+str(uid[1])+","+str(uid[2])+","+str(uid[3])
+        print "Card read UID: %s,%s,%s,%s" % (uid[0], uid[1], uid[2], uid[3])
     
         # This is the default key for authentication
         key = [0xFF,0xFF,0xFF,0xFF,0xFF,0xFF]