diff --git a/frei0r-plugins.spec b/frei0r-plugins.spec
index ee9fb97..5d3e273 100644
--- a/frei0r-plugins.spec
+++ b/frei0r-plugins.spec
@@ -1,12 +1,12 @@
 Name:          frei0r-plugins
 Version:       1.8.0
-Release:       1mamba
+Release:       2mamba
 Summary:       A minimalistic plugin API for video sources and filters
 Group:         System/Libraries
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
-URL:           https://www.piksel.org/frei0r
+URL:           https://frei0r.dyne.org/
 Source:        https://files.dyne.org/frei0r/frei0r-plugins-%{version}.tar.gz
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
@@ -16,6 +16,7 @@ BuildRequires: libgcc
 BuildRequires: libopencv-devel
 BuildRequires: libstdc++6-devel
 ## AUTOBUILDREQ-END
+BuildRequires: libopencv-devel >= 4.5.5-1mamba
 
 %description
 frei0r is a minimalistic plugin API for video sources and filters. The behavior of the effects can be controlled from the host by simple parameters. The intent is to solve the recurring reimplementation or adaptation issue of standard effects. It is not meant as a generic API for all kinds of video applications.
@@ -65,6 +66,9 @@ touch README.md ChangeLog TODO AUTHORS
 %doc README.txt
 
 %changelog
+* Sun May 29 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 1.8.0-2mamba
+- rebuilt with opencv 4.5.5
+
 * Sat Apr 02 2022 Automatic Build System <autodist@mambasoft.it> 1.8.0-1mamba
 - automatic version update by autodist