diff --git a/setup.py b/setup.py
index 52d8ed9..0aa2930 100644
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,4 @@
-# -*- coding: UTF-8 -*-
+# -*- coding: utf-8 -*-
 # coding: UTF-8
 #
 # Copyright 2010-2012 The pygit2 contributors