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-PyJWT.changes b/python-PyJWT.changes
index 081add2..148d6ed 100644
--- a/python-PyJWT.changes
+++ b/python-PyJWT.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Wed Apr 26 18:03:53 UTC 2017 - pousaduarte@gmail.com
+
+- Convert to singlespec
+- Remove unneeded dependency python-ecdsa
+- Use "download_files" in _service file to automate source fetching
+
 -------------------------------------------------------------------
 Fri Mar 17 18:58:52 UTC 2017 - rjschwei@suse.com
 
diff --git a/python-PyJWT.spec b/python-PyJWT.spec
index 9b29e65..8cc056f 100644
--- a/python-PyJWT.spec
+++ b/python-PyJWT.spec
@@ -16,11 +16,7 @@
 #
 
 
-%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_module:%define python_module() python-%{**} python3-%{**}}
 Name:           python-PyJWT
 Version:        1.4.2
 Release:        0
@@ -29,56 +25,60 @@ License:        MIT
 Group:          Development/Languages/Python
 Url:            https://github.com/progrium/pyjwt
 Source:         https://files.pythonhosted.org/packages/source/P/PyJWT/PyJWT-%{version}.tar.gz
-BuildRequires:  dos2unix
-BuildRequires:  python-cryptography
-BuildRequires:  python-devel
-BuildRequires:  python-ecdsa
-BuildRequires:  python-pytest
-BuildRequires:  python-pytest-cov >= 1.7
-BuildRequires:  python-pytest-runner
-BuildRequires:  python-setuptools
-Requires:       python-cryptography
-Requires:       python-ecdsa
-Requires(post): update-alternatives
-Requires(postun): update-alternatives
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 
+BuildRequires:  %{python_module cryptography}
+BuildRequires:  %{python_module devel}
+BuildRequires:  %{python_module pytest-cov >= 1.7}
+BuildRequires:  %{python_module pytest-runner}
+BuildRequires:  %{python_module pytest}
+BuildRequires:  %{python_module setuptools}
+BuildRequires:  dos2unix
+BuildRequires:  fdupes
+BuildRequires:  python-rpm-macros
+
+Requires:       python-cryptography
+Requires:       python-setuptools
+
+Requires(post):     update-alternatives
+Requires(postun):   update-alternatives
+
+BuildArch:      noarch
+
+%python_subpackages
+
 %description
 A Python implementation of JSON Web Token draft 01.
 
 %prep
 %setup -q -n PyJWT-%{version}
 dos2unix jwt/__main__.py
-sed -i -e "s/jwt = jwt.__main__:main/jwt-%{py_ver} = jwt.__main__:main/" setup.py
 
 %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
+%python_clone -a %{buildroot}%{_bindir}/jwt
 
-mkdir -p %{buildroot}%{_sysconfdir}/alternatives
-touch %{buildroot}%{_sysconfdir}/alternatives/jwt
-ln -sf %{_sysconfdir}/alternatives/jwt %{buildroot}/%{_bindir}/jwt
+#hardlink duplicated files
+%fdupes %{buildroot}
 
 %post
-update-alternatives \
-    --install %{_bindir}/jwt jwt %{_bindir}/jwt-%{py_ver} 30
+%python_install_alternative jwt
 
 %postun
-if [ $1 -eq 0 ] ; then
-    update-alternatives --remove jwt %{_bindir}/jwt-%{py_ver}
-fi
+%python_uninstall_alternative jwt
 
 %check
-PYTHONPATH=%{buildroot}%{python_sitelib} py.test -k "not test_verify_false_deprecated"
+%{python_expand PYTHONPATH=%{buildroot}%{python_sitelib} py.test-%{py_ver} -k "not test_verify_false_deprecated" }
 
-%files
+%files %python_files
 %defattr(-,root,root,-)
 %doc AUTHORS CHANGELOG.md LICENSE README.md
 %{python_sitelib}/*
-%{_bindir}/jwt
-%{_bindir}/jwt-%{py_ver}
-%ghost %{_sysconfdir}/alternatives/jwt
+%python_alternative %{_bindir}/jwt
 
 %changelog