diff --git a/common/themes/theme_manager.cpp b/common/themes/theme_manager.cpp
index e39554be..094000c2 100644
--- a/common/themes/theme_manager.cpp
+++ b/common/themes/theme_manager.cpp
@@ -21,8 +21,6 @@ ThemeManager &ThemeManager::instance()
 
 void ThemeManager::initialize()
 {
-    // QStyleHints::colorScheme is only 6.5+
-#if QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
     auto *styleHints = qGuiApp->styleHints();
 
     auto colorScheme = styleHints->colorScheme();
@@ -35,15 +33,6 @@ void ThemeManager::initialize()
     applyColorScheme(colorScheme);
 
     connect(styleHints, &QStyleHints::colorSchemeChanged, this, applyColorScheme, Qt::QueuedConnection);
-#else
-    auto applyPalette = [this](const QPalette &palette) {
-        setTheme(palette.color(QPalette::Window).lightness() < 128 ? ThemeId::Dark : ThemeId::Light);
-    };
-
-    applyPalette(qGuiApp->palette());
-
-    connect(qGuiApp, &QGuiApplication::paletteChanged, this, applyPalette, Qt::QueuedConnection);
-#endif
 }
 
 void ThemeManager::setTheme(ThemeId themeId)