diff --git a/python-ecdsa.spec b/python-ecdsa.spec
index f07efe8..2ad54b4 100644
--- a/python-ecdsa.spec
+++ b/python-ecdsa.spec
@@ -23,13 +23,11 @@ Release:        0
 Summary:        ECDSA cryptographic signature library (pure python)
 License:        MIT
 Group:          Development/Languages/Python
-Url:            http://github.com/warner/python-ecdsa
-Source:         https://pypi.python.org/packages/source/e/ecdsa/ecdsa-%{version}.tar.gz
+URL:            http://github.com/warner/python-ecdsa
+Source:         https://files.pythonhosted.org/packages/source/e/ecdsa/ecdsa-%{version}.tar.gz
 BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros
-BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 BuildArch:      noarch
-
 %python_subpackages
 
 %description
@@ -46,7 +44,7 @@ into other protocols.
 %build
 %python_build
 #remove shebang from all non executable files
-find ./ -type f -name "*.py" -perm 644 -exec sed -i -e '1{\@^#! /usr/bin/env python@d}' {} \;
+find ./ -type f -name "*.py" -perm 644 -exec sed -i -e '1{\@^#! %{_bindir}/env python@d}' {} \;
 
 %install
 %python_install
@@ -54,9 +52,9 @@ find ./ -type f -name "*.py" -perm 644 -exec sed -i -e '1{\@^#! /usr/bin/env pyt
 #hardlink duplicated files
 %fdupes %{buildroot}
 
-%files %python_files
-%defattr(-,root,root,-)
-%doc LICENSE NEWS README.md
+%files %{python_files}
+%license LICENSE
+%doc NEWS README.md
 %{python_sitelib}/*
 
 %changelog