diff --git a/opencv-clean.sh b/opencv-clean.sh
index 21c4be2..6d34466 100755
--- a/opencv-clean.sh
+++ b/opencv-clean.sh
@@ -1,29 +1,28 @@
 #!/bin/bash
 
-VERSION=4.5.0
+VERSION=4.5.1
+
+wget -c https://github.com/opencv/opencv/archive/${VERSION}/opencv-${VERSION}.tar.gz
+wget -c https://github.com/opencv/opencv_contrib/archive/${VERSION}/opencv_contrib-${VERSION}.tar.gz
+wget -c https://github.com/opencv/opencv_extra/archive/${VERSION}/opencv_extra-${VERSION}.tar.gz
 
 rm -rf opencv-${VERSION}/
-wget -c https://github.com/opencv/opencv/archive/${VERSION}/opencv-${VERSION}.tar.gz
 tar xf opencv-${VERSION}.tar.gz
-cd opencv-${VERSION}/
-find -iname "*lena*" -exec rm {} ';' -print
-find -iname "*lenna*" -exec rm {} ';' -print
-rm -r modules/xfeatures2d/
-cd ..; tar zcf opencv-clean-${VERSION}.tar.gz opencv-${VERSION}/
+find opencv-${VERSION}/ -iname "*lena*" -exec rm {} ';' -print
+find opencv-${VERSION}/ -iname "*lenna*" -exec rm {} ';' -print
+rm -r opencv-${VERSION}/modules/xfeatures2d/
+tar zcf opencv-clean-${VERSION}.tar.gz opencv-${VERSION}/
 rm -r opencv-${VERSION}/
 
 rm -rf opencv_contrib-${VERSION}/
-wget -c https://github.com/opencv/opencv_contrib/archive/${VERSION}/opencv_contrib-${VERSION}.tar.gz
 tar xf opencv_contrib-${VERSION}.tar.gz
-cd opencv_contrib-${VERSION}/
-find -iname "*lena*" -exec rm {} ';' -print
-find -iname "*lenna*" -exec rm {} ';' -print
-rm -r modules/xfeatures2d/
-cd ..; tar zcf opencv_contrib-clean-${VERSION}.tar.gz opencv_contrib-${VERSION}/
+find opencv_contrib-${VERSION}/ -iname "*lena*" -exec rm {} ';' -print
+find opencv_contrib-${VERSION}/ -iname "*lenna*" -exec rm {} ';' -print
+rm -r opencv_contrib-${VERSION}/modules/xfeatures2d/
+tar zcf opencv_contrib-clean-${VERSION}.tar.gz opencv_contrib-${VERSION}/
 rm -r opencv_contrib-${VERSION}/
 
 rm -rf opencv_extra-${VERSION}/
-wget -c https://github.com/opencv/opencv_extra/archive/${VERSION}/opencv_extra-${VERSION}.tar.gz
 tar xf opencv_extra-${VERSION}.tar.gz
 find opencv_extra-${VERSION} -iname "*lena*" -exec rm {} ';' -print
 find opencv_extra-${VERSION} -iname "*lenna*" -exec rm {} ';' -print
diff --git a/opencv-gcc11.patch b/opencv-gcc11.patch
new file mode 100644
index 0000000..a51a741
--- /dev/null
+++ b/opencv-gcc11.patch
@@ -0,0 +1,12 @@
+diff --git a/modules/gapi/test/gapi_async_test.cpp b/modules/gapi/test/gapi_async_test.cpp
+index 66b8be4..aa0c9c7 100644
+--- a/modules/gapi/test/gapi_async_test.cpp
++++ b/modules/gapi/test/gapi_async_test.cpp
+@@ -13,6 +13,7 @@
+ 
+ #include <condition_variable>
+ #include <stdexcept>
++#include <thread>
+ 
+ namespace opencv_test
+ {
diff --git a/opencv.spec b/opencv.spec
index 1135cf5..03673ef 100644
--- a/opencv.spec
+++ b/opencv.spec
@@ -1,5 +1,3 @@
-#global indice   a
-%undefine _strict_symbol_defs_build
 %undefine __cmake_in_source_build
 %bcond_without  tests
 %bcond_with     ffmpeg
@@ -22,7 +20,11 @@
 %bcond_with     atlas
 %bcond_without  openblas
 %bcond_without  gdcm
+%if 0%{?rhel} >= 8
+%bcond_with     vtk
+%else
 %bcond_without  vtk
+%endif
 
 %ifarch x86_64
 %bcond_without  libmfx
@@ -34,18 +36,16 @@
 %bcond_without  java
 %bcond_without  vulkan
 
-%ifarch ppc64le
 %define _lto_cflags %{nil}
-%endif
 
 %global srcname opencv
 
 
 Name:           opencv
-Version:        4.5.0
+Version:        4.5.1
 %global javaver %(foo=%{version}; echo ${foo//./})
 %global abiver  %(foo=%{version}; echo ${foo:0:3})
-Release:        1%{?dist}
+Release:        4%{?dist}
 Summary:        Collection of algorithms for computer vision
 # This is normal three clause BSD.
 License:        BSD
@@ -64,6 +64,7 @@ Source4:        b624b995ec9c439cbc2e9e6ee940d3a2-v0.1.1f.zip
 Source5:        xorg.conf
 
 Patch0:         opencv-4.1.0-install_3rdparty_licenses.patch
+Patch1:         %{name}-gcc11.patch
 
 BuildRequires:  gcc-c++
 BuildRequires:  libtool
@@ -124,7 +125,6 @@ BuildRequires:  python3-beautifulsoup4
 #for doc/doxygen/bib2xhtml.pl
 #BuildRequires:  perl-open
 BuildRequires:  gflags-devel
-BuildRequires:  SFML-devel
 BuildRequires:  libucil-devel
 BuildRequires:  qt5-qtbase-devel
 BuildRequires:  libGL-devel
@@ -242,6 +242,7 @@ popd &>/dev/null
 %endif
 
 %patch0 -p1 -b .install_3rdparty_licenses
+%patch1 -p1 -b .gcc11
 
 pushd %{name}_contrib-%{version}
 popd
@@ -461,6 +462,27 @@ ln -s -r %{buildroot}%{_jnidir}/opencv-%{javaver}.jar %{buildroot}%{_jnidir}/ope
 %{_libdir}/libopencv_xphoto.so.%{abiver}*
 
 %changelog
+* Wed Jan 27 2021 Tomas Popela <tpopela@redhat.com> - 4.5.1-4
+- Drop unused BR on SFML and disable VTK support on RHEL 8+
+
+* Tue Jan 26 2021 Fedora Release Engineering <releng@fedoraproject.org> - 4.5.1-3
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild
+
+* Tue Jan 12 14:20:57 CET 2021 Adrian Reber <adrian@lisas.de> - 4.5.1-2
+- Rebuilt for protobuf 3.14
+
+* Sat Jan 02 2021 Sérgio Basto <sergio@serjux.com> - 4.5.1-1
+- Update to 4.5.1
+
+* Fri Jan 01 2021 Richard Shaw <hobbes1069@gmail.com> - 4.5.0-4
+- Rebuild for OpenEXR 2.5.3.
+
+* Sat Dec  5 2020 Jeff Law <law@redhat.com> - 4.5.0-3
+- Fix missing #include for gcc-11
+
+* Fri Nov  6 22:47:45 CET 2020 Sandro Mani <manisandro@gmail.com> - 4.5.0-2
+- Rebuild (proj, gdal)
+
 * Thu Oct 15 2020 Sérgio Basto <sergio@serjux.com> - 4.5.0-1
 - Update 4.5.0
 
diff --git a/sources b/sources
index 7fdf782..1a230c9 100644
--- a/sources
+++ b/sources
@@ -1,5 +1,5 @@
-SHA512 (opencv-clean-4.5.0.tar.gz) = 536897f0fddaadb4cf5b23df7703e0826852867fdef0d9b9ee029c2c8df374246b9cb78795d1e8e4ef6da3285e1b6e4c74bea7aee16e974694d1ffa7a1d1d09f
-SHA512 (opencv_contrib-clean-4.5.0.tar.gz) = b9b42630847f0fbe083d2a3c8816ca676de668e25194b623973f351ba579a39144c858749087fc723333d41f44b0e0e30dd0ce86353e63ca3e4939fa590e0aea
-SHA512 (opencv_extra-clean-4.5.0.tar.gz) = 410693ca3a976ccf146ea04d5efa3a808f89c880b88dfa10dc9e7f1f37f639d4a3629fd5c402f44f2a68b22f6e7986ceb285d18a13af56ca866d49c4c6936180
+SHA512 (opencv-clean-4.5.1.tar.gz) = b93df3e0bc9162b350d6e921a1a21eb351dab6f785b08be2cdd5a5b912565cafbe45d3125dbc66f0b7642ccffe00fb8eb199729e07d1426d4f0956f8c63e8653
+SHA512 (opencv_contrib-clean-4.5.1.tar.gz) = f85e9e1ce08efa1eb31a4286387b77a9cb3466ec278db5db1a30318887fe905165559e56249e6aebaf4e33dee98063a790b230942ddf838df0e57a1535fbbf0b
+SHA512 (opencv_extra-clean-4.5.1.tar.gz) = 2c260978c6aacfc699e7e47cd70dc04d819c891f6bc7cc4d554cb0a6ad1bc05917d2d0ec1099c5c7c28c5fdf84531a14726fcd9ae4aff76e720650ddd6a88a21
 SHA512 (face_landmark_model.dat.xz) = 7558f29431bb9cad1f22ee067ad3ed41be8f68b865992eb7d3a5ce6b6b9e1d031cb03e33c3c149220ef8faebd0471703a8a3bbb06402bcc8ce76bd28317aa307
 SHA512 (b624b995ec9c439cbc2e9e6ee940d3a2-v0.1.1f.zip) = f2994d5e92a2ae05cee6e153943afe151ce734ced6e06dcdb02dee9fed9336a7f1ea69661d9e033f1412fbb5e2a44a6e641662c85be5ba0604d0446abeabe836