diff --git a/gnome-shell-extensions.spec b/gnome-shell-extensions.spec
index bd82b16..f87b160 100644
--- a/gnome-shell-extensions.spec
+++ b/gnome-shell-extensions.spec
@@ -6,7 +6,7 @@
 
 Name:           gnome-shell-extensions
 Version:        40.0~alpha.1
-Release:        3.20210212git9fa522c%{?dist}
+Release:        4.20210212git9fa522c%{?dist}
 Summary:        Modify and extend GNOME Shell functionality and behavior
 
 License:        GPLv2+
@@ -41,7 +41,7 @@ Enabled extensions:
 Summary:        Files common to GNOME Shell Extensions
 License:        GPLv2+
 Requires:       gnome-shell >= %{min_gs_version}
-Obsoletes:      %{pkg_prefix}-alternate-tab < 3.31.2
+Obsoletes:      %{pkg_prefix}-horizontal-workspace < 40
 
 %description -n %{pkg_prefix}-common
 GNOME Shell Extensions is a collection of extensions providing additional and
@@ -251,6 +251,10 @@ workspaces.
 
 
 %changelog
+* Mon Feb 15 2021 Mohamed El Morabity <melmorabity@fedoraproject.org> - 40.0~alpha.1-4.20210212git9fa522c
+- Add Obsoletes for horizontal-workspaces extension to fix upgrades to Fedora 34
+  (RHBZ #1928415)
+
 * Fri Feb 12 2021 Florian Müllner <fmuellner@redhat.com> - 40.0~alpha.1-3.20210212git9fa522c
 - Build snapshot of current upstream
 - Drop horizontal-workspaces subpackage