diff --git a/python-backports-entry_points_selectable.spec b/python-backports-entry_points_selectable.spec
index b8804e9..d48a382 100644
--- a/python-backports-entry_points_selectable.spec
+++ b/python-backports-entry_points_selectable.spec
@@ -1,7 +1,7 @@
 %define pkgname %(echo %name | cut -d- -f2-)
 Name:          python-backports-entry_points_selectable
 Version:       1.1.0
-Release:       1mamba
+Release:       2mamba
 Summary:       Compatibility shim providing selectable entry points for older implementations
 Group:         System/Libraries
 Vendor:        openmamba
@@ -19,6 +19,9 @@ BuildRequires: python3.7dist(importlib-metadata)
 %{summary}.
 
 %if 0%{?with_pyver}
+%define py_requires_append \
+Provides: python-backports%{?pyappend:-%pyappend} \
+Obsoletes: python-backports%{?pyappend:-%pyappend} <= 1.0-2mamba
 %pyver_package
 %endif
 
@@ -46,5 +49,8 @@ sed -i "\,\.egg-info/,d;s,.*/man/.*,&.gz," %{name}.filelist
 %doc LICENSE
 
 %changelog
+* Sat Sep 18 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 1.1.0-2mamba
+- obsolete python-backports
+
 * Tue Aug 31 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 1.1.0-1mamba
 - package created using the webbuild interface