diff --git a/python-pytools.changes b/python-pytools.changes
index f6f529c..13ac941 100644
--- a/python-pytools.changes
+++ b/python-pytools.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Sun Dec 20 09:56:53 UTC 2020 - Benjamin Greiner <code@bnavigator.de>
+
+- Update requirements
+
 -------------------------------------------------------------------
 Sun Dec 20 09:42:53 UTC 2020 - Dirk Müller <dmueller@suse.com>
 
diff --git a/python-pytools.spec b/python-pytools.spec
index 0ec283e..2194bc6 100644
--- a/python-pytools.spec
+++ b/python-pytools.spec
@@ -32,13 +32,16 @@ BuildRequires:  %{python_module decorator >= 3.2.0}
 BuildRequires:  %{python_module numpy >= 1.6.0}
 BuildRequires:  %{python_module pytest}
 BuildRequires:  %{python_module setuptools}
-BuildRequires:  %{python_module six >= 1.8.0}
+BuildRequires:  ( python3-dataclasses >= 0.7 if python3-base <= 3.6 )
+BuildRequires:  ( python36-dataclasses >= 0.7 if python36-base )
 BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros
 Requires:       python-appdirs >= 1.4.0
 Requires:       python-decorator >= 3.2.0
 Requires:       python-numpy >= 1.6.0
-Requires:       python-six >= 1.8.0
+%if %{python_version_nodots} <= 36
+Requires:       python-dataclasses >= 0.7
+%endif
 BuildArch:      noarch
 %python_subpackages