diff --git a/coin/provisioning/common/unix/libclang.sh b/coin/provisioning/common/unix/libclang.sh
index 60946e3a..2993f49c 100755
--- a/coin/provisioning/common/unix/libclang.sh
+++ b/coin/provisioning/common/unix/libclang.sh
@@ -47,23 +47,23 @@ source "${BASH_SOURCE%/*}/SetEnvVar.sh"
 # shellcheck source=./DownloadURL.sh
 source "${BASH_SOURCE%/*}/DownloadURL.sh"
 
-libclang_version=11.0
+libclang_version=12.0
 
 if uname -a |grep -q Darwin; then
     version=$libclang_version
     url="https://download.qt.io/development_releases/prebuilt/libclang/qt/libclang-release_${version//\./}-based-mac.7z"
     url_cached="http://ci-files01-hki.intra.qt.io/input/libclang/qt/libclang-release_${version//\./}-based-mac.7z"
-    sha1="2ea23914089df532385a527861feb010a867000b"
+    sha1="bb9223450c1c36ee37d8c91e876dba82db117a7a"
 elif test -f /etc/redhat-release && cat /etc/redhat-release | grep "Red Hat" | grep -v "8" ; then
     version=$libclang_version
-    url="https://download.qt.io/development_releases/prebuilt/libclang/qt/libclang-release_${version//\./}-based-linux-Rhel7.6-gcc5.3-x86_64.7z"
-    url_cached="http://ci-files01-hki.intra.qt.io/input/libclang/qt/libclang-release_${version//\./}-based-linux-Rhel7.6-gcc5.3-x86_64.7z"
-    sha1="eeb9b9bed81308cc4c7a7ac177e15baec7214d5e"
+    url="https://download.qt.io/development_releases/prebuilt/libclang/qt/libclang-release_${version//\./}-based-linux-CentOS8.3-gcc9.2-x86_64.7z"
+    url_cached="http://ci-files01-hki.intra.qt.io/input/libclang/qt/libclang-release_${version//\./}-based-linux-CentOS8.3-gcc9.2-x86_64.7z"
+    sha1="d02e4dd30fe3f810c3a0cdcbed5870dec56ed91b"
 else
     version=$libclang_version
     url="https://download.qt.io/development_releases/prebuilt/libclang/qt/libclang-release_${version//\./}-based-linux-Ubuntu20.04-gcc9.3-x86_64.7z"
     url_cached="http://ci-files01-hki.intra.qt.io/input/libclang/qt/libclang-release_${version//\./}-based-linux-Ubuntu20.04-gcc9.3-x86_64.7z"
-    sha1="57ebaac89bbe51a661f31a13c5e3829e34aa8b80"
+    sha1="81b3e640befa23b5cdebd59e206dc79e4de20ba3"
 fi
 
 zip="/tmp/libclang.7z"
diff --git a/coin/provisioning/common/windows/libclang.ps1 b/coin/provisioning/common/windows/libclang.ps1
index 2aa72ba8..ba7a7d80 100644
--- a/coin/provisioning/common/windows/libclang.ps1
+++ b/coin/provisioning/common/windows/libclang.ps1
@@ -5,7 +5,7 @@ param(
 )
 . "$PSScriptRoot\helpers.ps1"
 
-$libclang_version="11.0"
+$libclang_version="12.0"
 Write-Output "libClang = $libclang_version" >> ~/versions.txt
 
 # PySide versions following 5.6 use a C++ parser based on Clang (http://clang.org/).
@@ -39,7 +39,7 @@ $toolchainSuffix = ""
 
 if ( $toolchain -eq "vs2019" ) {
     if ( $archVer -eq 64 ) {
-        $sha1 = "ff0a30c881691068c14fbed9239b3583c8c45c6a"
+        $sha1 = "44fabbd45b4b7e659c49347c156bae09d7aaffdc"
     }
     else {
         $sha1 = ""
@@ -49,7 +49,7 @@ if ( $toolchain -eq "vs2019" ) {
 
 if ( $toolchain -eq "mingw" ) {
     if ( $archVer -eq 64 ) {
-        $sha1 = "40141a788b1ccb615544e18da27cd95b4986217b"
+        $sha1 = "9333170111aa90af6e1db824cd964dba227a4710"
     }
     else {
         $sha1 = ""
@@ -64,7 +64,7 @@ if ( $setDefault ) {
 }
 Set-EnvironmentVariable ("LLVM_INSTALL_DIR_${toolchainSuffix}") ($baseDestination + "-$archVer")
 
-if ( $libclang_version -eq "110" ) {
+if ( $libclang_version -eq "120" ) {
     # This is a hacked static build of libclang which requires special
     # handling on the qdoc side.
     Set-EnvironmentVariable "QDOC_USE_STATIC_LIBCLANG" "1"