diff --git a/appveyor.yml b/appveyor.yml
index 605810f62d..6ac4069298 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -3,23 +3,25 @@ image: Visual Studio 2019
 environment:
   nodejs_version: "20"
   matrix:
-    - QT: C:\Qt\5.15.2\msvc2019_64
       # As installed by `choco`
-      GOROOT: C:\Program Files\Go
+    - GOROOT: C:\Program Files\Go
       GOPATH: C:\gopath\
       GOTOOLCHAIN: local
       PLATFORM: amd64
-      COMPILER: msvc
+      PYTHON: C:\Python312
 
 install:
   - ps: Install-Product node $env:nodejs_version
+  - choco install python --version=3.12.6
+  - python -m pip install aqtinstall
+  - aqt install-qt windows desktop 6.2.4 win64_mingw -m qtpositioning qtserialport qtwebchannel qtwebengine
   - git submodule update --init --recursive
 
 matrix:
   fast_finish: true
 
 before_build:
-  - set PATH=%QT5%\bin;C:\Qt\Tools\QtCreator\bin\;%GOROOT%\bin;C:\gopath\bin\;C:\Qt\5.15.2\msvc2019_64\bin\;C:\mingw-w64\x86_64-8.1.0-posix-seh-rt_v6-rev0\mingw64\bin;C:\MinGW\bin;%PATH%
+  - set PATH=C:\Qt\Tools\QtCreator\bin\;%GOROOT%\bin;C:\gopath\bin\;C:\Qt\6.2.4\mingw_64\bin\;C:\mingw-w64\x86_64-8.1.0-posix-seh-rt_v6-rev0\mingw64\bin;C:\MinGW\bin;%PATH%
   - set MINGW_BIN=/c/mingw-w64/x86_64-8.1.0-posix-seh-rt_v6-rev0/mingw64/bin
 
 build_script:
diff --git a/frontends/qt/BitBox.pro b/frontends/qt/BitBox.pro
index 79400f65ac..2fe142d008 100644
--- a/frontends/qt/BitBox.pro
+++ b/frontends/qt/BitBox.pro
@@ -6,6 +6,11 @@
 
 QT       += core gui
 QT       += webenginewidgets
+win32 {
+    # For setting 'AlwaysActivate', see.
+    # See https://forum.qt.io/topic/133694/using-alwaysactivatewindow-to-gain-foreground-in-win10-using-qt6-2/2
+    QT += gui-private
+}
 
 TARGET = BitBox
 TEMPLATE = app
diff --git a/frontends/qt/main.cpp b/frontends/qt/main.cpp
index 9914d82245..07bfcad564 100644
--- a/frontends/qt/main.cpp
+++ b/frontends/qt/main.cpp
@@ -33,8 +33,12 @@
 #include <QMessageBox>
 #include <QtGlobal>
 #if defined(_WIN32)
+#if QT_VERSION_MAJOR >= 6
+#include <private/qguiapplication_p.h>
+#else
 #include <QtPlatformHeaders/QWindowsWindowFunctions>
 #endif
+#endif
 
 #include <iostream>
 #include <set>
@@ -401,7 +405,15 @@ int main(int argc, char *argv[])
 #if defined(_WIN32)
     // Allow existing app to be brought to the foreground. See `view->activateWindow()` above.
     // Without this, on Windows, only the taskbar entry would light up.
+#if QT_VERSION_MAJOR >= 6
+    // See See https://forum.qt.io/topic/133694/using-alwaysactivatewindow-to-gain-foreground-in-win10-using-qt6-2/2
+    // Later Qt versions may expose this API again officially. https://www.qt.io/blog/platform-apis-in-qt-6.
+    if (auto inf = a.nativeInterface<QNativeInterface::Private::QWindowsApplication>()) {
+        inf->setWindowActivationBehavior(QNativeInterface::Private::QWindowsApplication::AlwaysActivateWindow);
+    }
+#else
     QWindowsWindowFunctions::setWindowActivationBehavior(QWindowsWindowFunctions::AlwaysActivateWindow);
+#endif
 #endif
 
     // Receive and handle an URI sent by a secondary instance (see above).