diff --git a/python-nkdfu.changes b/python-nkdfu.changes
index 91a8e38..1fa4009 100644
--- a/python-nkdfu.changes
+++ b/python-nkdfu.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Sat May 13 19:40:32 UTC 2023 - Matej Cepl <mcepl@suse.com>
+
+- Clean up SPEC file
+
 -------------------------------------------------------------------
 Thu May 11 19:42:03 UTC 2023 - Johannes Kastl <kastl@b1-systems.de>
 
diff --git a/python-nkdfu.spec b/python-nkdfu.spec
index 9d7a154..c682bf5 100644
--- a/python-nkdfu.spec
+++ b/python-nkdfu.spec
@@ -21,18 +21,22 @@ Name:           python-nkdfu
 Version:        0.2
 Release:        0
 Summary:        DFU tool for updating Nitrokeys' firmware
-License:        GPL-2.0
+License:        GPL-2.0-only
 URL:            https://github.com/Nitrokey/nkdfu
 Source:         https://files.pythonhosted.org/packages/source/n/nkdfu/nkdfu-0.2.tar.gz
-BuildRequires:  python-rpm-macros
 BuildRequires:  %{python_module flit}
 BuildRequires:  %{python_module pip}
 BuildRequires:  %{python_module setuptools}
 BuildRequires:  %{python_module wheel}
 BuildRequires:  fdupes
-BuildArch:      noarch
+BuildRequires:  python-rpm-macros
+Requires:       python-fire
+Requires:       python-intelhex
+Requires:       python-libusb1
+Requires:       python-tqdm
 Requires(post): update-alternatives
-Requires(postun): update-alternatives
+Requires(postun):update-alternatives
+BuildArch:      noarch
 %python_subpackages
 
 %description
@@ -40,7 +44,10 @@ nkdfu is a Python DFU tool for updating Nitrokeys' firmware. Currently supports
 Based on python-dfu project, which brings implementation of USB DFU 1.1 spec.
 
 %prep
-%setup -q -n nkdfu-%{version}
+%autosetup -p1 -n nkdfu-%{version}
+
+sed -i -e '1{\@^#![[:blank:]]*%{_bindir}/env python@d}' nkdfu/dfu_flash.py
+chmod -x nkdfu/dfu_flash.py
 
 %build
 %pyproject_wheel
@@ -62,6 +69,7 @@ Based on python-dfu project, which brings implementation of USB DFU 1.1 spec.
 %doc README.md
 %license LICENSE
 %python_alternative %{_bindir}/nkdfu
-%{python_sitelib}/*
+%{python_sitelib}/nkdfu
+%{python_sitelib}/nkdfu-%{version}*-info
 
 %changelog