diff --git a/setup.py b/setup.py
index <HASH>..<HASH> 100644
--- a/setup.py
+++ b/setup.py
@@ -1,13 +1,13 @@
 from distutils.core import setup
 setup(
-	name = 'usonic',
-	packages = ['usonic'],
-	version = '0.0.1',
-	description = 'An ultrasonic distance measurement module using HC-SR04',
-	author = 'Macpaul Lin',
-	author_email = 'macpaul@gmail.com',
-	url = 'https://github.com/macpaul/usonic',
-	download_url = 'https://github.com/macpaul/usonic/tarball/0.0.1',
-	keywords = ['ultrasonic', 'raspberry', 'distance'],
-	classifiers = [],
+    name = 'usonic',
+    packages = ['usonic'],
+    version = '0.0.1',
+    description = 'An ultrasonic distance measurement module using HC-SR04',
+    author = 'Macpaul Lin',
+    author_email = 'macpaul@gmail.com',
+    url = 'https://github.com/macpaul/usonic',
+    download_url = 'https://github.com/macpaul/usonic/tarball/0.0.1',
+    keywords = ['ultrasonic', 'raspberry', 'distance'],
+    classifiers = [],
 )
setup.py: fix coding style

Replace tab by 4 spaces.