diff --git a/python-ssdeep.changes b/python-ssdeep.changes
index 01c90b6..3b845da 100644
--- a/python-ssdeep.changes
+++ b/python-ssdeep.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon Nov  8 10:50:31 UTC 2021 - Dirk Müller <dmueller@suse.com>
+
+- add missing six dependency declaration 
+
 -------------------------------------------------------------------
 Wed Jan 13 12:25:28 UTC 2021 - pgajdos@suse.com
 
diff --git a/python-ssdeep.spec b/python-ssdeep.spec
index 3365276..c199303 100644
--- a/python-ssdeep.spec
+++ b/python-ssdeep.spec
@@ -30,10 +30,12 @@ Source:         https://github.com/DinoTools/python-ssdeep/archive/%{version}.ta
 BuildRequires:  %{python_module cffi >= 0.8.6}
 BuildRequires:  %{python_module devel}
 BuildRequires:  %{python_module setuptools}
+BuildRequires:  %{python_module six}
 BuildRequires:  fdupes
 BuildRequires:  libfuzzy-devel
 BuildRequires:  python-rpm-macros
 Requires:       python-cffi
+Requires:       python-six
 Requires:       ssdeep
 # SECTION tests
 BuildRequires:  %{python_module pytest-runner}