diff --git a/python-smpplib-use-unittest-mock.patch b/python-smpplib-use-unittest-mock.patch
new file mode 100644
index 0000000..1d9c277
--- /dev/null
+++ b/python-smpplib-use-unittest-mock.patch
@@ -0,0 +1,56 @@
+diff --git a/.circleci/config.yml b/.circleci/config.yml
+index 6ae73bb..a5b583a 100644
+--- a/.circleci/config.yml
++++ b/.circleci/config.yml
+@@ -25,7 +25,7 @@ jobs:
+                 virtualenv -p "$(which python || which pypy)" ./venv
+             )
+             . venv/bin/activate
+-            pip install pytest mock
++            pip install pytest
+       - run:
+           name: Install project
+           command: |
+diff --git a/setup.py b/setup.py
+index 8940285..ea154e1 100644
+--- a/setup.py
++++ b/setup.py
+@@ -11,7 +11,7 @@ setup(
+     long_description_content_type='text/markdown',
+     packages=find_packages(),
+     install_requires=['six'],
+-    tests_require=['pytest', 'mock', 'tox'],
++    tests_require=['pytest', 'tox'],
+     zip_safe=True,
+     classifiers=[
+         'Development Status :: 5 - Production/Stable',
+diff --git a/tests/test_gsm.py b/tests/test_gsm.py
+index b6641fd..7760dc4 100644
+--- a/tests/test_gsm.py
++++ b/tests/test_gsm.py
+@@ -1,6 +1,6 @@
+ # -*- coding: utf8 -*-
+ 
+-import mock
++from unittest.mock import patch
+ from pytest import mark, raises
+ 
+ from smpplib import consts
+@@ -39,7 +39,7 @@ def test_make_parts_single(plaintext, encoding, expected_parts, expected_encodin
+     ]),
+ ])
+ def test_make_parts_multiple(plaintext, expected):
+-    with mock.patch('random.randint') as randint:
++    with patch('random.randint') as randint:
+         randint.return_value = 0x42
+         assert make_parts(plaintext) == (expected, consts.SMPP_ENCODING_DEFAULT, consts.SMPP_GSMFEAT_UDHI)
+ 
+@@ -49,7 +49,7 @@ def test_make_parts_multiple(plaintext, expected):
+     (b'12345', 2, [b'\x05\x00\x03\x42\x03\x0112', b'\x05\x00\x03\x42\x03\x0234', b'\x05\x00\x03\x42\x03\x035']),
+ ])
+ def test_make_parts_encoded(encoded_text, part_size, expected):
+-    with mock.patch('random.randint') as randint:
++    with patch('random.randint') as randint:
+         randint.return_value = 0x42
+         assert make_parts_encoded(encoded_text, part_size) == expected
+ 
diff --git a/python-smpplib.changes b/python-smpplib.changes
index 1779384..56b427b 100644
--- a/python-smpplib.changes
+++ b/python-smpplib.changes
@@ -1,3 +1,11 @@
+-------------------------------------------------------------------
+Mon Sep  7 07:26:54 UTC 2020 - Martin Hauke <mardnh@gmx.de>
+
+- Use a more meaningful description
+- Add patch:
+  * python-smpplib-use-unittest-mock.patch
+    Use 'unitest.mock' instead of the external mock package
+
 -------------------------------------------------------------------
 Mon Sep  7 05:49:43 UTC 2020 - Martin Hauke <mardnh@gmx.de>
 
diff --git a/python-smpplib.spec b/python-smpplib.spec
index 62b2e89..2a27801 100644
--- a/python-smpplib.spec
+++ b/python-smpplib.spec
@@ -1,6 +1,7 @@
 #
 # spec file for package python-smpplib
 #
+# Copyright (c) 2020 SUSE LLC
 # Copyright (c) 2016-2020, Martin Hauke <mardnh@gmx.de>
 #
 # All modifications and additions to the file contributed by third parties
@@ -12,23 +13,24 @@
 # license that conforms to the Open Source Definition (Version 1.9)
 # published by the Open Source Initiative.
 
-# Please submit bugfixes or comments via http://bugs.opensuse.org/
+# Please submit bugfixes or comments via https://bugs.opensuse.org/
 #
 
+
 %{?!python_module:%define python_module() python-%{**} python3-%{**}}
 Name:           python-smpplib
 Version:        2.1.0
 Release:        0
 Summary:        SMPP library for Python
-License:        LGPL-2.0
+License:        LGPL-2.0-only
 Group:          Development/Languages/Python
 URL:            https://pypi.org/project/smpplib/
 #Git-Clone:     https://github.com/python-smpplib/python-smpplib.git
 Source:         https://github.com/python-smpplib/python-smpplib/archive/%{version}.tar.gz#/smpplib-%{version}.tar.gz
-BuildRequires:  python-rpm-macros
+Patch0:         python-smpplib-use-unittest-mock.patch
 BuildRequires:  %{python_module setuptools}
+BuildRequires:  python-rpm-macros
 # SECTION test requirements
-BuildRequires:  %{python_module mock}
 BuildRequires:  %{python_module pytest}
 # /SECTION
 BuildRequires:  fdupes
@@ -37,10 +39,14 @@ BuildArch:      noarch
 %python_subpackages 
 
 %description
-SMPP library for Python.
+SMPP is the Short Message Peer-to-Peer protocol for conveying SMS
+operations.
+Python-smpplib is a python based SMPP 3.4 client library that
+allows you to send and receive SMS to an SMS gateway or SMSC.
 
 %prep
 %setup -q -n python-smpplib-%{version}
+%patch0 -p1
 
 %build
 %python_build