diff --git a/src/plugins/platforms/ios/qiosscreen.h b/src/plugins/platforms/ios/qiosscreen.h
index dd694283908..07c8f71a53d 100644
--- a/src/plugins/platforms/ios/qiosscreen.h
+++ b/src/plugins/platforms/ios/qiosscreen.h
@@ -8,6 +8,8 @@
 
 #include <qpa/qplatformscreen.h>
 
+#include <QtCore/private/qcore_mac_p.h>
+
 @class QIOSOrientationListener;
 
 QT_BEGIN_NAMESPACE
@@ -53,6 +55,7 @@ private:
 
 #if !defined(Q_OS_VISIONOS)
     UIScreen *m_uiScreen = nullptr;
+    QMacNotificationObserver m_screenBrightnessObserver;
 #endif
     QRect m_geometry;
     QRect m_availableGeometry;
diff --git a/src/plugins/platforms/ios/qiosscreen.mm b/src/plugins/platforms/ios/qiosscreen.mm
index c5944ba1a7e..843e33bb8de 100644
--- a/src/plugins/platforms/ios/qiosscreen.mm
+++ b/src/plugins/platforms/ios/qiosscreen.mm
@@ -180,6 +180,27 @@ QIOSScreen::QIOSScreen(UIScreen *screen)
     m_displayLink.paused = YES; // Enabled when clients call QWindow::requestUpdate()
     [m_displayLink addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];
 
+
+    // The screen brightness might affect the EDR headroom of the display,
+    // which might affect the rendering of windows that opt in to EDR.
+    m_screenBrightnessObserver = QMacNotificationObserver(m_uiScreen,
+        UIScreenBrightnessDidChangeNotification, [&]() {
+            if (@available(iOS 17, *)) {
+                for (auto *window : QPlatformScreen::windows()) {
+                    auto *platformWindow = static_cast<QIOSWindow*>(window->handle());
+                    if (!platformWindow)
+                        continue;
+
+                    UIView *view = platformWindow->view();
+
+                    if (!view.layer.wantsExtendedDynamicRangeContent)
+                        continue;
+
+                    [view setNeedsDisplay];
+                }
+            }
+        });
+
 #endif // !defined(Q_OS_VISIONOS))
 
     updateProperties();