diff --git a/autobuild/windows/autobuild_windowsinstaller_1_prepare.ps1 b/autobuild/windows/autobuild_windowsinstaller_1_prepare.ps1
index a57254484d..ddab188895 100644
--- a/autobuild/windows/autobuild_windowsinstaller_1_prepare.ps1
+++ b/autobuild/windows/autobuild_windowsinstaller_1_prepare.ps1
@@ -40,8 +40,9 @@ Function Install-Qt {
 
 $QtDir = 'C:\Qt'
 $ChocoCacheDir = 'C:\ChocoCache'
+# Qt6 does not provide 32bit binaries, so use latest Qt5 instead:
 $Qt32Version = "5.15.2"
-$Qt64Version = "5.15.2"
+$Qt64Version = "6.2.3"
 $AqtinstallVersion = "2.0.5"
 $JackVersion = "1.9.17"
 $Msvc32Version = "win32_msvc2019"
diff --git a/autobuild/windows/autobuild_windowsinstaller_2_build.ps1 b/autobuild/windows/autobuild_windowsinstaller_2_build.ps1
index 960aed3ecf..7ea40e399d 100644
--- a/autobuild/windows/autobuild_windowsinstaller_2_build.ps1
+++ b/autobuild/windows/autobuild_windowsinstaller_2_build.ps1
@@ -33,11 +33,11 @@ echo "Build installer..."
 # Build the installer
 if ($BuildOption -ne "")
 {
-    powershell "$jamulus_project_path\windows\deploy_windows.ps1" "C:\Qt\5.15.2" "C:\Qt\5.15.2" -BuildOption $BuildOption
+    powershell "$jamulus_project_path\windows\deploy_windows.ps1" "C:\Qt\5.15.2" "C:\Qt\6.2.3" -BuildOption $BuildOption
 }
 else
 {
-    powershell "$jamulus_project_path\windows\deploy_windows.ps1" "C:\Qt\5.15.2" "C:\Qt\5.15.2"
+    powershell "$jamulus_project_path\windows\deploy_windows.ps1" "C:\Qt\5.15.2" "C:\Qt\6.2.3"
 }
 if ( !$? )
 {
diff --git a/windows/deploy_windows.ps1 b/windows/deploy_windows.ps1
index d82cdeb108..275bf0ba9d 100644
--- a/windows/deploy_windows.ps1
+++ b/windows/deploy_windows.ps1
@@ -1,7 +1,7 @@
 param (
     # Replace default path with system Qt installation folder if necessary
     [string] $QtInstallPath32 = "C:\Qt\5.15.2",
-    [string] $QtInstallPath64 = "C:\Qt\5.15.2",
+    [string] $QtInstallPath64 = "C:\Qt\6.2.3",
     [string] $QtCompile32 = "msvc2019",
     [string] $QtCompile64 = "msvc2019_64",
     [string] $AsioSDKName = "asiosdk_2.3.3_2019-06-14",