diff --git a/tools/jenkins/include/scripts/build-Linux-sdk.sh b/tools/jenkins/include/scripts/build-Linux-sdk.sh
index 451f92bae0..66d3cdcfb5 100755
--- a/tools/jenkins/include/scripts/build-Linux-sdk.sh
+++ b/tools/jenkins/include/scripts/build-Linux-sdk.sh
@@ -195,7 +195,7 @@ EOF
         fi
         # Note: perl-version added for qt4webkit, see https://github.com/NatronGitHub/Natron/issues/351#issuecomment-524068232
         # perl-Encode and perl-Data-Dumper needed to build texinfo before perl
-        YUM_PKGS="make util-linux git tar bzip2 wget glibc-devel diffutils patch zip unzip libX11-devel mesa-libGL-devel mesa-libGLU-devel libXrender-devel libSM-devel libICE-devel libXcursor-devel libXrender-devel libXrandr-devel libXinerama-devel libXi-devel libXv-devel libXfixes-devel libXvMC-devel libXxf86vm-devel libxkbfile-devel libXdamage-devel libXp-devel libXScrnSaver-devel libXcomposite-devel libXp-devel libXres-devel xorg-x11-proto-devel libXxf86dga-devel libXpm-devel perl-Digest-MD5 perl-version perl-Encode perl-Data-Dumper"
+        YUM_PKGS="ca-certificates make util-linux git tar bzip2 wget glibc-devel diffutils patch zip unzip libX11-devel mesa-libGL-devel mesa-libGLU-devel libXrender-devel libSM-devel libICE-devel libXcursor-devel libXrender-devel libXrandr-devel libXinerama-devel libXi-devel libXv-devel libXfixes-devel libXvMC-devel libXxf86vm-devel libxkbfile-devel libXdamage-devel libXp-devel libXScrnSaver-devel libXcomposite-devel libXp-devel libXres-devel xorg-x11-proto-devel libXxf86dga-devel libXpm-devel perl-Digest-MD5 perl-version perl-Encode perl-Data-Dumper"
         SDKPREP="RUN ${PREYUM}${DTSYUM}yum -y install ${YUM_PKGS} ${YUM_DEVEL_EXTRA} && yum -y clean all"
         cat <<EOF
 FROM $DOCKER_BASE as intermediate
@@ -893,6 +893,8 @@ checkpoint
 
 build qt4webkit
 
+checkpoint
+
 if dobuild; then
     # add qt4 to lib path to build shiboken and pyside
     LD_LIBRARY_PATH="$QT4PREFIX/lib${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}"
diff --git a/tools/jenkins/include/scripts/pkg/aom.sh b/tools/jenkins/include/scripts/pkg/aom.sh
index 10eecb01e1..27696428dc 100644
--- a/tools/jenkins/include/scripts/pkg/aom.sh
+++ b/tools/jenkins/include/scripts/pkg/aom.sh
@@ -2,7 +2,7 @@
 
 # Install aom (Alliance for Open Media AV1)
 # see https://aomedia.googlesource.com/aom/
-AOM_VERSION=3.1.2
+AOM_VERSION=3.2.0
 #AOM_TAR="aom-${AOM_VERSION}.tar.gz"
 #AOM_SITE=""
 AOM_GIT="https://aomedia.googlesource.com/aom.git"
diff --git a/tools/jenkins/include/scripts/pkg/automake.sh b/tools/jenkins/include/scripts/pkg/automake.sh
index f61b1f27fe..753104f20c 100644
--- a/tools/jenkins/include/scripts/pkg/automake.sh
+++ b/tools/jenkins/include/scripts/pkg/automake.sh
@@ -2,7 +2,7 @@
 
 # Install automake
 # see http://www.linuxfromscratch.org/lfs/view/development/chapter08/automake.html
-AUTOMAKE_VERSION=1.16.4
+AUTOMAKE_VERSION=1.16.5
 AUTOMAKE_TAR="automake-${AUTOMAKE_VERSION}.tar.xz"
 AUTOMAKE_SITE="https://ftp.gnu.org/gnu/automake"
 if download_step; then
diff --git a/tools/jenkins/include/scripts/pkg/git.sh b/tools/jenkins/include/scripts/pkg/git.sh
index 09e3643a83..046d976ace 100644
--- a/tools/jenkins/include/scripts/pkg/git.sh
+++ b/tools/jenkins/include/scripts/pkg/git.sh
@@ -2,7 +2,7 @@
 
 # Install git (requires curl and pcre)
 # see http://www.linuxfromscratch.org/blfs/view/svn/general/git.html
-GIT_VERSION=2.33.0
+GIT_VERSION=2.33.1
 GIT_TAR="git-${GIT_VERSION}.tar.xz"
 GIT_SITE="https://www.kernel.org/pub/software/scm/git"
 if download_step; then
diff --git a/tools/jenkins/include/scripts/pkg/ilmbase.sh b/tools/jenkins/include/scripts/pkg/ilmbase.sh
index 5a4e226991..1769c3d256 100644
--- a/tools/jenkins/include/scripts/pkg/ilmbase.sh
+++ b/tools/jenkins/include/scripts/pkg/ilmbase.sh
@@ -5,7 +5,7 @@
 # Note: upgrading to 2.4.1-2.5.1 requires rewriting the download and build scripts
 # (openexr is now a single package).
 #EXR_VERSION=2.5.7
-EXR_VERSION=3.1.1
+EXR_VERSION=3.1.2
 EXR_CXX11_CONFIGURE_FLAGS=
 if version_gt "2.4.0" "${EXR_VERSION}"; then
     EXR_CXX11_CONFIGURE_FLAGS=--enable-cxxstd=11
diff --git a/tools/jenkins/include/scripts/pkg/itstool.sh b/tools/jenkins/include/scripts/pkg/itstool.sh
index 2cbeb1b196..f284337aec 100644
--- a/tools/jenkins/include/scripts/pkg/itstool.sh
+++ b/tools/jenkins/include/scripts/pkg/itstool.sh
@@ -2,7 +2,7 @@
 
 # Install itstool
 # see http://www.linuxfromscratch.org/blfs/view/svn/pst/itstool.html
-ITSTOOL_VERSION=2.0.6 
+ITSTOOL_VERSION=2.0.7
 ITSTOOL_TAR="itstool-${ITSTOOL_VERSION}.tar.bz2"
 ITSTOOL_SITE="http://files.itstool.org/itstool"
 if download_step; then
diff --git a/tools/jenkins/include/scripts/pkg/libvpx.sh b/tools/jenkins/include/scripts/pkg/libvpx.sh
index 9d00d1de3f..a2d9528e97 100644
--- a/tools/jenkins/include/scripts/pkg/libvpx.sh
+++ b/tools/jenkins/include/scripts/pkg/libvpx.sh
@@ -2,7 +2,7 @@
 
 # Install libvpx
 # see http://www.linuxfromscratch.org/blfs/view/svn/multimedia/libvpx.html
-LIBVPX_VERSION=1.10.0
+LIBVPX_VERSION=1.11.0
 LIBVPX_TAR="libvpx-${LIBVPX_VERSION}.tar.gz"
 #LIBVPX_SITE=http://storage.googleapis.com/downloads.webmproject.org/releases/webm
 if download_step; then
diff --git a/tools/jenkins/include/scripts/pkg/openexr.sh b/tools/jenkins/include/scripts/pkg/openexr.sh
index cbb5c583b6..b04caa67aa 100644
--- a/tools/jenkins/include/scripts/pkg/openexr.sh
+++ b/tools/jenkins/include/scripts/pkg/openexr.sh
@@ -4,7 +4,7 @@
 # see https://github.com/openexr/openexr/releases/
 if [ -z ${EXR_VERSION+x} ]; then
 #EXR_VERSION=2.5.7
-EXR_VERSION=3.1.1
+EXR_VERSION=3.1.2
 EXR_CXX11_CONFIGURE_FLAGS=
 if version_gt "2.4.0" "${EXR_VERSION}"; then
     EXR_CXX11_CONFIGURE_FLAGS=--enable-cxxstd=11
diff --git a/tools/jenkins/include/scripts/pkg/pyside.sh b/tools/jenkins/include/scripts/pkg/pyside.sh
index ef113843f7..71c93da037 100644
--- a/tools/jenkins/include/scripts/pkg/pyside.sh
+++ b/tools/jenkins/include/scripts/pkg/pyside.sh
@@ -1,6 +1,8 @@
 #!/bin/bash
 
 # Install pyside
+# See https://aur.archlinux.org/cgit/aur.git/tree/PKGBUILD?h=python-pyside
+# for building both for Python 2 and Python 3.
 PYSIDE_VERSION=1.2.4
 #PYSIDE_TAR="pyside-qt4.8+${PYSIDE_VERSION}.tar.bz2"
 #PYSIDE_SITE="https://download.qt.io/official_releases/pyside"
diff --git a/tools/jenkins/include/scripts/pkg/shiboken.sh b/tools/jenkins/include/scripts/pkg/shiboken.sh
index e8e30ca097..afd401cdbc 100644
--- a/tools/jenkins/include/scripts/pkg/shiboken.sh
+++ b/tools/jenkins/include/scripts/pkg/shiboken.sh
@@ -1,6 +1,8 @@
 #!/bin/bash
 
 # Install shiboken
+# See https://aur.archlinux.org/cgit/aur.git/tree/PKGBUILD?h=shiboken
+# for building both for Python 2 and Python 3.
 SHIBOKEN_VERSION=1.2.4
 #SHIBOKEN_TAR="shiboken-${SHIBOKEN_VERSION}.tar.bz2"
 #SHIBOKEN_SITE="https://download.qt.io/official_releases/pyside"