diff --git a/python-mmtf.spec b/python-mmtf.spec
index 0e06971..82d7bf3 100644
--- a/python-mmtf.spec
+++ b/python-mmtf.spec
@@ -21,9 +21,8 @@ doi: 10.1145/2945292.2945324\
 
 
 Name: python-mmtf
-Version: 1.1.2
+Version: 1.1.3
 Release: %autorelease
-Epoch: 1
 Summary: A decoding library for the macromolecular transmission format (MMTF) 
 License: Apache-2.0
 URL: https://github.com/rcsb/mmtf-python
@@ -36,13 +35,11 @@ BuildArch: noarch
 %package -n python3-mmtf
 Summary: %{summary}
 BuildRequires: python3-devel
-BuildRequires: python3-setuptools
 %if %{with check}
 BuildRequires: python3-msgpack
 BuildRequires: python3-pytest
 BuildRequires: python3-numpy
 %endif
-%{?python_provide:%python_provide python3-mmtf}
 Requires: python3-msgpack
 
 %description -n python3-mmtf
@@ -51,22 +48,25 @@ Requires: python3-msgpack
 %prep
 %setup -q -n %{pname}-%{version}
 
+%generate_buildrequires
+%pyproject_buildrequires
+
 %build
-%py3_build
+%pyproject_wheel
 
 %install
-%py3_install
+%pyproject_install
+%pyproject_save_files -l mmtf
 
 %if %{with check}
 %check
+%pyproject_check_import
+
 %pytest mmtf/tests/codec_tests.py
 %endif
 
-%files -n python3-mmtf
-%license LICENSE.txt
+%files -n python3-mmtf -f %{pyproject_files}
 %doc CHANGELOG.md README.md
-%{python3_sitelib}/mmtf_python-%{version}-py%{python3_version}.egg-info
-%{python3_sitelib}/mmtf
 
 %changelog
 %autochangelog
diff --git a/sources b/sources
index 3b4fcfc..14839d7 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (mmtf-python-1.1.2.tar.gz) = 92afcce48c2de186cbf9c2cb39c94c5df14ae0eb613862d41b674b7d2f338855ed81be23fb14d16d2dfc8d33415d3904537ef4a422e3a52b78d461b609e968ca
+SHA512 (mmtf-python-1.1.3.tar.gz) = 44558ea3e38e8eb6431e597253473e49d4a4e3835f790f375f923d3c3702b3c096d5ecaac090a8fabc1cd285d6cfa8dbd3f7d6186d765b92d718ca6d34ad063b