diff --git a/_service b/_service
new file mode 100644
index 0000000..790feac
--- /dev/null
+++ b/_service
@@ -0,0 +1,7 @@
+<services>
+ <service name="download_files" mode="localonly">
+    <param name="enforceupstream">yes</param>
+    <param name="changesgenerate">enable</param>
+ </service>
+ <service name="set_version" mode="localonly"/>
+</services>
diff --git a/python-ecdsa.changes b/python-ecdsa.changes
index 8bceb73..60753fc 100644
--- a/python-ecdsa.changes
+++ b/python-ecdsa.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Fri Apr 28 11:52:09 UTC 2017 - pousaduarte@gmail.com
+
+- Convert to singlespec
+- Use "download_files" in _service file to automate source fetching
+
 -------------------------------------------------------------------
 Sat Feb 21 01:31:36 UTC 2015 - prusnak@opensuse.org
 
diff --git a/python-ecdsa.spec b/python-ecdsa.spec
index 445eab7..2891658 100644
--- a/python-ecdsa.spec
+++ b/python-ecdsa.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package python-ecdsa
 #
-# Copyright (c) 2015 SUSE LINUX Products GmbH, Nuernberg, Germany.
+# Copyright (c) 2017 SUSE LINUX GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -16,6 +16,7 @@
 #
 
 
+%{?!python_module:%define python_module() python-%{**} python3-%{**}}
 Name:           python-ecdsa
 Version:        0.13
 Release:        0
@@ -24,13 +25,13 @@ 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
-BuildRequires:  python-devel
+BuildRequires:  %{python_module devel}
+BuildRequires:  fdupes
+BuildRequires:  python-rpm-macros
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
-%if 0%{?suse_version} && 0%{?suse_version} <= 1110
-%{!?python_sitelib: %global python_sitelib %(python -c "from distutils.sysconfig import get_python_lib; print get_python_lib()")}
-%else
 BuildArch:      noarch
-%endif
+
+%python_subpackages
 
 %description
 This is an easy-to-use implementation of ECDSA cryptography (Elliptic Curve
@@ -44,12 +45,17 @@ into other protocols.
 %setup -q -n ecdsa-%{version}
 
 %build
-python setup.py 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}' {} \;
 
 %install
-python setup.py install --prefix=%{_prefix} --root=%{buildroot}
+%python_install
 
-%files
+#hardlink duplicated files
+%fdupes %{buildroot}
+
+%files %python_files
 %defattr(-,root,root,-)
 %doc LICENSE NEWS README.md
 %{python_sitelib}/*