diff --git a/opencv.spec b/opencv.spec
index f803e3e..d07c6e5 100644
--- a/opencv.spec
+++ b/opencv.spec
@@ -1,14 +1,14 @@
 %define pkgver %(echo %version | sed "s|[a-z]||")
 %define javaver %(echo %version | cut -d. -f1-3 | tr -d .)
 Name:          opencv
-Version:       4.5.1
+Version:       4.5.2
 Release:       1mamba
 Summary:       Collection of algorithms for computer vision
 Group:         Development/Libraries
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Davide Madrisan <davide.madrisan@gmail.com>
-URL:           http://opencv.willowgarage.com/wiki/
+URL:           https://opencv.willowgarage.com/wiki/
 Source:        https://sourceforge.net/projects/opencvlibrary/files/%{version}/OpenCV%20%{version}.tar.gz
 #Source:        http://downloads.sourceforge.net/project/opencvlibrary/opencv-unix/%{version}/opencv-%{version}.tar.gz
 Patch0:        %{name}-2.1.0-libpng14.patch
@@ -46,7 +46,6 @@ BuildRequires: libxine-devel
 #BuildRequires: python-Imaging
 #BuildRequires: python-numpy
 Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 OpenCV (Open Source Computer Vision) is a library of programming functions for real time computer vision.
@@ -216,6 +215,9 @@ rm -fr %{buildroot}%{_datadir}/opencv/doc
 %endif
 
 %changelog
+* Sat Apr 03 2021 Automatic Build System <autodist@mambasoft.it> 4.5.2-1mamba
+- automatic version update by autodist
+
 * Tue Dec 29 2020 Automatic Build System <autodist@mambasoft.it> 4.5.1-1mamba
 - automatic version update by autodist