diff --git a/usbinstall.spec b/usbinstall.spec
index f8860fe..8beb0bd 100644
--- a/usbinstall.spec
+++ b/usbinstall.spec
@@ -1,6 +1,6 @@
 Name:          usbinstall
 Version:       1.10.0
-Release:       1mamba
+Release:       2mamba
 Summary:       A script with a GUI frontend to install openmamba into a removable storage device
 Group:         System/Tools
 Vendor:        openmamba
@@ -10,6 +10,7 @@ URL:           http://gitlab.mambasoft.it/openmamba/usbinstall.git
 Source:        http://gitlab.mambasoft.it/openmamba/usbinstall.git/v%{version}/%{name}-%{version}.tar.bz2
 License:       GPL
 Requires:      PyQt4-py3
+Requires:      python-sip4-py3
 Requires:      pygobject-py3
 Requires:      python-dbus-py3
 %ifarch %{ix86} x86_64
@@ -75,6 +76,9 @@ Scripts to install openmamba rootfs archives to SD and then to internal MMC devi
 %{_prefix}/libexec/init_resize
 
 %changelog
+* Sun Jan 03 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 1.10.0-2mamba
+- require python-sip4-py3
+
 * Mon Dec 21 2020 Silvan Calarco <silvan.calarco@mambasoft.it> 1.10.0-1mamba
 - update to 1.10.0