diff --git a/CMakeLists.txt b/CMakeLists.txt
index cf0834a..95b0f6b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,7 +7,7 @@
 add_subdirectory(external)
 if (LINUX
     AND NOT DESKTOP_APP_USE_PACKAGED
-    AND Qt5WaylandClient_FOUND)
+    AND NOT DESKTOP_APP_DISABLE_WAYLAND_INTEGRATION)
     add_subdirectory(linux_wayland_helper)
 endif()
 if (LINUX AND NOT DESKTOP_APP_USE_PACKAGED)
diff --git a/external/CMakeLists.txt b/external/CMakeLists.txt
index 1460cf9..633ceb5 100644
--- a/external/CMakeLists.txt
+++ b/external/CMakeLists.txt
@@ -14,12 +14,14 @@ endmacro()
 add_checked_subdirectory(angle)
 add_checked_subdirectory(auto_updates)
 add_checked_subdirectory(crash_reports)
-if (LINUX AND NOT DESKTOP_APP_DISABLE_DBUS_INTEGRATION)
+if (LINUX AND NOT DESKTOP_APP_DISABLE_DBUS_INTEGRATION AND NOT DESKTOP_APP_QT6)
     add_checked_subdirectory(dbusmenu_qt)
 endif()
 add_checked_subdirectory(expected)
 if (LINUX AND NOT DESKTOP_APP_DISABLE_DBUS_INTEGRATION)
-    add_checked_subdirectory(fcitx_qt5)
+    if (NOT DESKTOP_APP_QT6)
+        add_checked_subdirectory(fcitx_qt5)
+    endif()
     if (NOT DESKTOP_APP_DISABLE_X11_INTEGRATION)
         add_checked_subdirectory(fcitx5_qt)
     endif()
@@ -30,7 +32,7 @@ if (LINUX AND NOT DESKTOP_APP_DISABLE_DBUS_INTEGRATION)
     add_checked_subdirectory(glibmm)
 endif()
 add_checked_subdirectory(gsl)
-if (LINUX AND NOT DESKTOP_APP_DISABLE_X11_INTEGRATION)
+if (LINUX AND NOT DESKTOP_APP_DISABLE_X11_INTEGRATION AND NOT DESKTOP_APP_QT6)
     add_checked_subdirectory(hime_qt)
 endif()
 if (add_hunspell_library)
@@ -41,7 +43,7 @@ if (LINUX)
     add_checked_subdirectory(jemalloc)
 endif()
 add_checked_subdirectory(jpeg)
-if (LINUX AND NOT DESKTOP_APP_DISABLE_WAYLAND_INTEGRATION)
+if (LINUX AND NOT DESKTOP_APP_DISABLE_WAYLAND_INTEGRATION AND NOT DESKTOP_APP_QT6)
     add_checked_subdirectory(kwayland)
 endif()
 add_checked_subdirectory(lz4)
@@ -57,7 +59,7 @@ add_checked_subdirectory(qr_code_generator)
 add_checked_subdirectory(ranges)
 add_checked_subdirectory(rlottie)
 add_checked_subdirectory(rnnoise)
-if (LINUX AND NOT DESKTOP_APP_DISABLE_DBUS_INTEGRATION)
+if (LINUX AND NOT DESKTOP_APP_DISABLE_DBUS_INTEGRATION AND NOT DESKTOP_APP_QT6)
     add_checked_subdirectory(statusnotifieritem)
 endif()
 add_checked_subdirectory(ton)
diff --git a/external/fcitx5_qt/CMakeLists.txt b/external/fcitx5_qt/CMakeLists.txt
index 0058582..cc3ead4 100644
--- a/external/fcitx5_qt/CMakeLists.txt
+++ b/external/fcitx5_qt/CMakeLists.txt
@@ -13,11 +13,21 @@ else()
     init_target(external_fcitx5_qt "(external)")
 
     set(fcitx5_qt_loc ${third_party_loc}/fcitx5-qt)
-    set(fcitx5_qt_src ${fcitx5_qt_loc}/qt5/platforminputcontext)
+
+    if (DESKTOP_APP_QT6)
+        set(fcitx5_qt_src ${fcitx5_qt_loc}/qt6/platforminputcontext)
+    else()
+        set(fcitx5_qt_src ${fcitx5_qt_loc}/qt5/platforminputcontext)
+    endif()
 
     set_target_properties(external_fcitx5_qt PROPERTIES AUTOMOC ON)
 
-    set(FCITX5_QT_EXTRA_PLUGIN_NAME "")
+    if (DESKTOP_APP_QT6)
+        set(FCITX5_QT_EXTRA_PLUGIN_NAME "\"fcitx\",")
+    else()
+        set(FCITX5_QT_EXTRA_PLUGIN_NAME "")
+    endif()
+
     configure_file("${fcitx5_qt_src}/fcitx5.json.in" "${CMAKE_CURRENT_BINARY_DIR}/fcitx5.json")
 
     nice_target_sources(external_fcitx5_qt ${fcitx5_qt_src}
diff --git a/external/fcitx5_qt/fcitx5_qt_dbusaddons/CMakeLists.txt b/external/fcitx5_qt/fcitx5_qt_dbusaddons/CMakeLists.txt
index be7cfe1..9b15c46 100644
--- a/external/fcitx5_qt/fcitx5_qt_dbusaddons/CMakeLists.txt
+++ b/external/fcitx5_qt/fcitx5_qt_dbusaddons/CMakeLists.txt
@@ -13,7 +13,12 @@ else()
     init_target(external_fcitx5_qt_dbusaddons "(external)")
 
     set(fcitx5_qt_loc ${third_party_loc}/fcitx5-qt)
-    set(fcitx5_qt_dbusaddons_src ${fcitx5_qt_loc}/qt5/dbusaddons)
+
+    if (DESKTOP_APP_QT6)
+        set(fcitx5_qt_dbusaddons_src ${fcitx5_qt_loc}/qt6/dbusaddons)
+    else()
+        set(fcitx5_qt_dbusaddons_src ${fcitx5_qt_loc}/qt5/dbusaddons)
+    endif()
 
     set_target_properties(external_fcitx5_qt_dbusaddons PROPERTIES AUTOMOC ON)
 
@@ -33,7 +38,12 @@ else()
     )
 
     include(GenerateExportHeader)
-    generate_export_header(external_fcitx5_qt_dbusaddons BASE_NAME Fcitx5Qt5DBusAddons)
+
+    if (DESKTOP_APP_QT6)
+        generate_export_header(external_fcitx5_qt_dbusaddons BASE_NAME Fcitx5Qt6DBusAddons)
+    else()
+        generate_export_header(external_fcitx5_qt_dbusaddons BASE_NAME Fcitx5Qt5DBusAddons)
+    endif()
 
     target_include_directories(external_fcitx5_qt_dbusaddons
     PUBLIC
@@ -41,10 +51,12 @@ else()
         "${CMAKE_CURRENT_BINARY_DIR}"
     )
 
-    target_compile_definitions(external_fcitx5_qt_dbusaddons
-    PRIVATE
-        FCITX5QT5DBUSADDONS_STATIC_DEFINE
-    )
+    if (NOT DESKTOP_APP_QT6)
+        target_compile_definitions(external_fcitx5_qt_dbusaddons
+        PRIVATE
+            FCITX5QT5DBUSADDONS_STATIC_DEFINE
+        )
+    endif()
 
     target_link_libraries(external_fcitx5_qt_dbusaddons
     PRIVATE
diff --git a/external/qt/CMakeLists.txt b/external/qt/CMakeLists.txt
index 5c25aa1..f1649ad 100644
--- a/external/qt/CMakeLists.txt
+++ b/external/qt/CMakeLists.txt
@@ -4,11 +4,15 @@
 # For license and copyright information please follow this link:
 # https://github.com/desktop-app/legal/blob/master/LEGAL
 
+add_subdirectory(qt_static_plugins)
+if (DESKTOP_APP_QT6)
+    add_subdirectory(qt6)
+    return()
+endif()
+
 add_library(external_qt INTERFACE IMPORTED GLOBAL)
 add_library(desktop-app::external_qt ALIAS external_qt)
 
-add_subdirectory(qt_static_plugins)
-
 if (DESKTOP_APP_USE_PACKAGED)
     target_link_libraries(external_qt
     INTERFACE
diff --git a/external/qt/package.cmake b/external/qt/package.cmake
index 3169cbe..7a778d8 100644
--- a/external/qt/package.cmake
+++ b/external/qt/package.cmake
@@ -5,7 +5,11 @@
 # https://github.com/desktop-app/legal/blob/master/LEGAL
 
 if (NOT DESKTOP_APP_USE_PACKAGED)
-    set(qt_version 5.15.2)
+    if (DESKTOP_APP_QT6)
+        set(qt_version 6.2.0)
+    else()
+        set(qt_version 5.15.2)
+    endif()
 
     if (WIN32)
         set(qt_loc ${libs_loc}/Qt-${qt_version})
@@ -15,22 +19,37 @@ if (NOT DESKTOP_APP_USE_PACKAGED)
         set(qt_loc /usr/local/desktop-app/Qt-${qt_version})
     endif()
 
-    set(Qt5_DIR ${qt_loc}/lib/cmake/Qt5)
+    set(CMAKE_PREFIX_PATH ${qt_loc})
 endif()
 
-find_package(Qt5 COMPONENTS Core Gui Widgets Network Svg REQUIRED)
-find_package(Qt5Gui COMPONENTS QWebpPlugin REQUIRED)
+if (DESKTOP_APP_QT6)
+    find_package(Qt6 COMPONENTS Core Core5Compat Gui OpenGL Widgets OpenGLWidgets Network Svg REQUIRED)
+else()
+    find_package(Qt5 COMPONENTS Core Gui Widgets Network Svg REQUIRED)
+endif()
 
 if (LINUX)
     if (NOT DESKTOP_APP_DISABLE_WAYLAND_INTEGRATION)
-        find_package(Qt5 COMPONENTS WaylandClient REQUIRED)
-        find_package(Qt5 OPTIONAL_COMPONENTS XkbCommonSupport QUIET)
+        if (DESKTOP_APP_QT6)
+            find_package(Qt6 COMPONENTS WaylandClient REQUIRED)
+        else()
+            find_package(Qt5 COMPONENTS WaylandClient REQUIRED)
+            find_package(Qt5 OPTIONAL_COMPONENTS XkbCommonSupport QUIET)
+        endif()
     endif()
 
-    if (DESKTOP_APP_DISABLE_DBUS_INTEGRATION)
-        find_package(Qt5 OPTIONAL_COMPONENTS DBus QUIET)
-    else()
-        find_package(Qt5 COMPONENTS DBus REQUIRED)
+    if (NOT DESKTOP_APP_DISABLE_DBUS_INTEGRATION)
+        if (DESKTOP_APP_QT6)
+            find_package(Qt6 COMPONENTS DBus REQUIRED)
+        else()
+            find_package(Qt5 COMPONENTS DBus REQUIRED)
+        endif()
+    elseif (NOT DESKTOP_APP_USE_PACKAGED)
+        if (DESKTOP_APP_QT6)
+            find_package(Qt6 OPTIONAL_COMPONENTS DBus QUIET)
+        else()
+            find_package(Qt5 OPTIONAL_COMPONENTS DBus QUIET)
+        endif()
     endif()
 endif()
 
diff --git a/external/qt/qt6/CMakeLists.txt b/external/qt/qt6/CMakeLists.txt
new file mode 100644
index 0000000..8426de7
--- /dev/null
+++ b/external/qt/qt6/CMakeLists.txt
@@ -0,0 +1,276 @@
+# This file is part of Desktop App Toolkit,
+# a set of libraries for developing nice desktop applications.
+#
+# For license and copyright information please follow this link:
+# https://github.com/desktop-app/legal/blob/master/LEGAL
+
+add_library(external_qt INTERFACE IMPORTED GLOBAL)
+add_library(desktop-app::external_qt ALIAS external_qt)
+
+if (DESKTOP_APP_USE_PACKAGED)
+    target_link_libraries(external_qt
+    INTERFACE
+        Qt6::Core
+        Qt6::Core5Compat
+        Qt6::Gui
+        Qt6::OpenGL
+        Qt6::Widgets
+        Qt6::OpenGLWidgets
+        Qt6::Network
+        Qt6::Svg
+    )
+
+    target_include_directories(external_qt SYSTEM
+    INTERFACE
+        ${Qt6Core_PRIVATE_INCLUDE_DIRS}
+        ${Qt6Gui_PRIVATE_INCLUDE_DIRS}
+    )
+
+    if (Qt6DBus_FOUND)
+        target_link_libraries(external_qt INTERFACE Qt6::DBus)
+    endif()
+
+    if (Qt6WaylandClient_FOUND)
+        target_link_libraries(external_qt INTERFACE Qt6::WaylandClient)
+
+        target_include_directories(external_qt SYSTEM
+        INTERFACE
+            ${Qt6WaylandClient_PRIVATE_INCLUDE_DIRS}
+        )
+    endif()
+else()
+    target_include_directories(external_qt SYSTEM
+    INTERFACE
+        ${qt_loc}/include
+        ${qt_loc}/include/QtCore
+        ${qt_loc}/include/QtCore5Compat
+        ${qt_loc}/include/QtGui
+        ${qt_loc}/include/QtOpenGL
+        ${qt_loc}/include/QtWidgets
+        ${qt_loc}/include/QtOpenGLWidgets
+        ${qt_loc}/include/QtSvg
+        ${qt_loc}/include/QtCore/${qt_version}
+        ${qt_loc}/include/QtGui/${qt_version}
+        ${qt_loc}/include/QtCore/${qt_version}/QtCore
+        ${qt_loc}/include/QtGui/${qt_version}/QtGui
+    )
+
+    if (Qt6DBus_FOUND)
+        target_include_directories(external_qt SYSTEM
+        INTERFACE
+            ${qt_loc}/include/QtDBus
+        )
+    endif()
+
+    if (Qt6WaylandClient_FOUND)
+        target_include_directories(external_qt SYSTEM
+        INTERFACE
+            ${qt_loc}/include/QtWaylandClient
+            ${qt_loc}/include/QtWaylandClient/${qt_version}
+            ${qt_loc}/include/QtWaylandClient/${qt_version}/QtWaylandClient
+        )
+    endif()
+
+    target_compile_definitions(external_qt
+    INTERFACE
+        _REENTRANT
+        QT_STATICPLUGIN
+        QT_PLUGIN
+        QT_SVG_LIB
+        QT_NETWORK_LIB
+        QT_OPENGLWIDGETS_LIB
+        QT_WIDGETS_LIB
+        QT_OPENGL_LIB
+        QT_GUI_LIB
+        QT_CORE5COMPAT_LIB
+        QT_CORE_LIB
+    )
+
+    if (Qt6DBus_FOUND)
+        target_compile_definitions(external_qt
+        INTERFACE
+            QT_DBUS_LIB
+        )
+    endif()
+
+    if (Qt6WaylandClient_FOUND)
+        target_compile_definitions(external_qt
+        INTERFACE
+            QT_WAYLANDCLIENT_LIB
+        )
+    endif()
+
+    if (WIN32)
+        set(qt_lib_prefix "")
+        set(qt_lib_suffix $<$<CONFIG:Debug>:d>.lib)
+    else()
+        set(qt_lib_prefix lib)
+        if (APPLE)
+            set(qt_lib_suffix $<$<CONFIG:Debug>:_debug>.a)
+        else()
+            set(qt_lib_suffix .a)
+        endif()
+    endif()
+
+    if (LINUX)
+        set(qt_lib_objects objects-RelWithDebInfo)
+    else()
+        set(qt_lib_objects objects-$<IF:$<CONFIG:Debug>,Debug,RelWithDebInfo>)
+    endif()
+
+    set(common_qt_libs
+        plugins/imageformats/${qt_lib_prefix}qwebp
+        plugins/imageformats/${qt_lib_prefix}qgif
+        plugins/imageformats/${qt_lib_prefix}qjpeg
+        lib/${qt_lib_prefix}Qt6Svg
+        lib/${qt_lib_prefix}Qt6Network
+        lib/${qt_lib_prefix}Qt6OpenGLWidgets
+        lib/${qt_lib_prefix}Qt6Widgets
+        lib/${qt_lib_prefix}Qt6OpenGL
+        lib/${qt_lib_prefix}Qt6Gui
+        lib/${qt_lib_prefix}Qt6Core5Compat
+        lib/${qt_lib_prefix}Qt6Core
+        lib/${qt_lib_prefix}Qt6BundledHarfbuzz
+        lib/${qt_lib_prefix}Qt6BundledLibpng
+        lib/${qt_lib_prefix}Qt6BundledPcre2
+    )
+
+    set(qt_libs_list "")
+    if (WIN32)
+        set(qt_libs
+            ${common_qt_libs}
+            lib/${qt_lib_prefix}Qt6WindowsUIAutomationSupport
+            lib/${qt_lib_prefix}qtmain
+            lib/${qt_lib_prefix}qtfreetype
+            plugins/platforms/${qt_lib_prefix}qwindows
+        )
+        foreach (lib ${qt_libs})
+            list(APPEND qt_libs_list "${qt_loc}/${lib}${qt_lib_suffix}")
+        endforeach()
+
+        target_link_libraries(external_qt
+        INTERFACE
+            desktop-app::external_angle
+        )
+    elseif (APPLE)
+        set(qt_libs
+            ${common_qt_libs}
+            lib/${qt_lib_prefix}Qt6GraphicsSupport
+            lib/${qt_lib_prefix}Qt6ClipboardSupport
+            lib/${qt_lib_prefix}qtfreetype
+            plugins/platforms/${qt_lib_prefix}qcocoa
+        )
+        foreach (lib ${qt_libs})
+            list(APPEND qt_libs_list "${qt_loc}/${lib}${qt_lib_suffix}")
+        endforeach()
+    else()
+        set(qt_libs_dbus)
+        set(qt_libs_dbus_plugins)
+        if (Qt6DBus_FOUND)
+            set(qt_libs_dbus
+                lib/${qt_lib_prefix}Qt6DBus
+                lib/${qt_lib_prefix}Qt6Core
+            )
+            set(qt_libs_dbus_plugins
+                plugins/platforminputcontexts/${qt_lib_prefix}ibusplatforminputcontextplugin
+            )
+        endif()
+        set(qt_libs_waylandclient)
+        set(qt_libs_waylandclient_plugins)
+        if (Qt6WaylandClient_FOUND)
+            set(qt_libs_waylandclient
+                lib/${qt_lib_prefix}Qt6WaylandEglClientHwIntegration
+                lib/${qt_lib_prefix}Qt6WaylandClient
+            )
+            set(qt_libs_waylandclient_plugins
+                plugins/platforms/${qt_lib_prefix}qwayland-generic
+                plugins/platforms/${qt_lib_prefix}qwayland-egl
+                plugins/wayland-graphics-integration-client/${qt_lib_prefix}qt-plugin-wayland-egl
+                plugins/wayland-decoration-client/${qt_lib_prefix}bradient
+            )
+        endif()
+        set(qt_libs
+            plugins/platforminputcontexts/${qt_lib_prefix}composeplatforminputcontextplugin
+            ${qt_libs_dbus_plugins}
+            ${qt_libs_waylandclient_plugins}
+            plugins/platformthemes/${qt_lib_prefix}qgtk3
+            plugins/platforms/${qt_lib_prefix}qxcb
+            plugins/xcbglintegrations/${qt_lib_prefix}qxcb-egl-integration
+            plugins/xcbglintegrations/${qt_lib_prefix}qxcb-glx-integration
+            plugins/iconengines/${qt_lib_prefix}qsvgicon
+            lib/${qt_lib_prefix}Qt6XcbQpa
+            ${qt_libs_waylandclient}
+            ${common_qt_libs}
+            ${qt_libs_dbus}
+        )
+        foreach (lib ${qt_libs})
+            list(APPEND qt_libs_list "${qt_loc}/${lib}${qt_lib_suffix}")
+        endforeach()
+    endif()
+
+    list(APPEND qt_libs_list
+        "${qt_loc}/lib/${qt_lib_objects}/Gui_resources_1/.rcc/qrc_qpdf.cpp.o"
+        "${qt_loc}/lib/${qt_lib_objects}/Widgets_resources_1/.rcc/qrc_qstyle.cpp.o"
+        "${qt_loc}/lib/${qt_lib_objects}/Widgets_resources_2/.rcc/qrc_qstyle1.cpp.o"
+        "${qt_loc}/lib/${qt_lib_objects}/Widgets_resources_3/.rcc/qrc_qmessagebox.cpp.o"
+    )
+
+    target_link_libraries(external_qt
+    INTERFACE
+        ${qt_libs_list}
+        $<TARGET_FILE:desktop-app::external_openssl_ssl>
+        $<TARGET_FILE:desktop-app::external_openssl_crypto>
+        desktop-app::external_jpeg
+        desktop-app::external_zlib
+    )
+
+    if (LINUX)
+        target_include_directories(external_qt SYSTEM
+        INTERFACE
+            ${qt_loc}/mkspecs/linux-g++
+        )
+        target_link_static_libraries(external_qt
+        INTERFACE
+            proxy
+            epoxy
+            xkbcommon
+            xkbcommon-x11
+            xcb-glx
+            xcb-xkb
+            xcb-randr
+            xcb-icccm
+            xcb-shm
+            xcb-render
+            xcb-image
+            xcb-xfixes
+            xcb-xinput
+            xcb-shape
+            xcb-sync
+            xcb-util
+            xcb-render-util
+            xcb-keysyms
+            z
+        )
+        if (Qt6WaylandClient_FOUND)
+            target_link_libraries(external_qt
+            INTERFACE
+                desktop-app::linux_wayland_helper
+                $<TARGET_FILE:desktop-app::linux_wayland_helper>
+            )
+        endif()
+        target_link_libraries(external_qt
+        INTERFACE
+            desktop-app::linux_gtk_helper
+            $<TARGET_FILE:desktop-app::linux_gtk_helper>
+            desktop-app::linux_glib_helper
+            $<TARGET_FILE:desktop-app::linux_glib_helper>
+            fontconfig
+            freetype
+            xcb
+            X11
+            X11-xcb
+            ${CMAKE_DL_LIBS}
+            pthread
+        )
+    endif()
+endif()
diff --git a/external/qt/qt_static_plugins/CMakeLists.txt b/external/qt/qt_static_plugins/CMakeLists.txt
index 7a8651a..5fad7e3 100644
--- a/external/qt/qt_static_plugins/CMakeLists.txt
+++ b/external/qt/qt_static_plugins/CMakeLists.txt
@@ -25,10 +25,12 @@ if (LINUX)
     )
 
     if (NOT DESKTOP_APP_DISABLE_DBUS_INTEGRATION)
-        target_link_libraries(external_qt_static_plugins
-        PUBLIC
-            desktop-app::external_fcitx_qt5
-        )
+        if (NOT DESKTOP_APP_QT6)
+            target_link_libraries(external_qt_static_plugins
+            PUBLIC
+                desktop-app::external_fcitx_qt5
+            )
+        endif()
 
         if (NOT DESKTOP_APP_DISABLE_X11_INTEGRATION)
             target_link_libraries(external_qt_static_plugins
@@ -38,7 +40,7 @@ if (LINUX)
         endif()
     endif()
 
-    if (NOT DESKTOP_APP_DISABLE_X11_INTEGRATION)
+    if (NOT DESKTOP_APP_DISABLE_X11_INTEGRATION AND NOT DESKTOP_APP_QT6)
         target_link_libraries(external_qt_static_plugins
         PUBLIC
             desktop-app::external_hime_qt
diff --git a/external/qt/qt_static_plugins/qt_static_plugins.cpp b/external/qt/qt_static_plugins/qt_static_plugins.cpp
index 25fc093..f876501 100644
--- a/external/qt/qt_static_plugins/qt_static_plugins.cpp
+++ b/external/qt/qt_static_plugins/qt_static_plugins.cpp
@@ -8,7 +8,10 @@ https://github.com/desktop-app/legal/blob/master/LEGAL
 #include <QtCore/QtPlugin>
 
 #ifndef DESKTOP_APP_USE_PACKAGED
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
 Q_IMPORT_PLUGIN(QGenericEnginePlugin)
+#endif // Qt < 6.0.0
+
 Q_IMPORT_PLUGIN(QWebpPlugin)
 Q_IMPORT_PLUGIN(QJpegPlugin)
 Q_IMPORT_PLUGIN(QGifPlugin)
@@ -24,8 +27,10 @@ Q_IMPORT_PLUGIN(QXcbGlxIntegrationPlugin)
 Q_IMPORT_PLUGIN(QComposePlatformInputContextPlugin)
 Q_IMPORT_PLUGIN(QSvgIconPlugin)
 #ifndef DESKTOP_APP_DISABLE_DBUS_INTEGRATION
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
 Q_IMPORT_PLUGIN(QConnmanEnginePlugin)
 Q_IMPORT_PLUGIN(QNetworkManagerEnginePlugin)
+#endif // Qt < 6.0.0
 Q_IMPORT_PLUGIN(QIbusPlatformInputContextPlugin)
 #endif // !DESKTOP_APP_DISABLE_DBUS_INTEGRATION
 #ifndef DESKTOP_APP_DISABLE_WAYLAND_INTEGRATION
@@ -42,13 +47,17 @@ Q_IMPORT_PLUGIN(QGtk3ThemePlugin)
 #if !defined DESKTOP_APP_USE_PACKAGED || defined DESKTOP_APP_USE_PACKAGED_LAZY
 Q_IMPORT_PLUGIN(NimfInputContextPlugin)
 #ifndef DESKTOP_APP_DISABLE_DBUS_INTEGRATION
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
 Q_IMPORT_PLUGIN(QFcitxPlatformInputContextPlugin)
+#endif // Qt < 6.0.0
 #ifndef DESKTOP_APP_DISABLE_X11_INTEGRATION
 Q_IMPORT_PLUGIN(QFcitx5PlatformInputContextPlugin)
 #endif // !DESKTOP_APP_DISABLE_X11_INTEGRATION
 #endif // !DESKTOP_APP_DISABLE_DBUS_INTEGRATION
 #ifndef DESKTOP_APP_DISABLE_X11_INTEGRATION
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
 Q_IMPORT_PLUGIN(QHimePlatformInputContextPlugin)
+#endif // Qt < 6.0.0
 #endif // !DESKTOP_APP_DISABLE_X11_INTEGRATION
 #endif // !DESKTOP_APP_USE_PACKAGED || DESKTOP_APP_USE_PACKAGED_LAZY
 #endif // Q_OS_UNIX && !Q_OS_MAC
diff --git a/linux_glib_helper/linux_glib_helper.cpp b/linux_glib_helper/linux_glib_helper.cpp
index a6d0474..b312d83 100644
--- a/linux_glib_helper/linux_glib_helper.cpp
+++ b/linux_glib_helper/linux_glib_helper.cpp
@@ -29,6 +29,7 @@ guint (*g_log_set_handler)(
 GMainContext* (*g_main_context_default)(void);
 gboolean (*g_main_context_iteration)(GMainContext* context, gboolean may_block);
 GMainContext* (*g_main_context_new)(void);
+// TODO: Remove when Qt 5 support will be dropped
 gboolean (*g_main_context_pending)(GMainContext* context);
 void (*g_main_context_pop_thread_default)(GMainContext* context);
 void (*g_main_context_push_thread_default)(GMainContext* context);
@@ -46,6 +47,7 @@ void (*g_source_destroy)(GSource* source);
 GSource* (*g_source_new)(GSourceFuncs* source_funcs, guint struct_size);
 void (*g_source_remove_poll)(GSource* source, GPollFD* fd);
 void (*g_source_set_can_recurse)(GSource* source, gboolean can_recurse);
+void (*g_source_set_name)(GSource* source, const char* name);
 void (*g_source_unref)(GSource* source);
 int (*g_strcmp0)(const char* str1, const char* str2);
 
@@ -140,6 +142,7 @@ bool Resolve() {
 			&& LOAD_SYMBOL(lib, g_source_new)
 			&& LOAD_SYMBOL(lib, g_source_remove_poll)
 			&& LOAD_SYMBOL(lib, g_source_set_can_recurse)
+			&& LOAD_SYMBOL(lib, g_source_set_name)
 			&& LOAD_SYMBOL(lib, g_source_unref)
 			&& LOAD_SYMBOL(lib, g_strcmp0)
 			&& LoadLibrary(lib, "libgobject-2.0.so.0")
@@ -283,6 +286,11 @@ void g_source_set_can_recurse(GSource* source, gboolean can_recurse) {
 	GlibHelper::g_source_set_can_recurse(source, can_recurse);
 }
 
+void g_source_set_name(GSource* source, const char* name) {
+	GlibHelper::Resolve();
+	GlibHelper::g_source_set_name(source, name);
+}
+
 void g_source_unref(GSource* source) {
 	GlibHelper::Resolve();
 	GlibHelper::g_source_unref(source);
diff --git a/options.cmake b/options.cmake
index 91d8897..85e2f3c 100644
--- a/options.cmake
+++ b/options.cmake
@@ -12,6 +12,7 @@ INTERFACE
     $<$<CONFIG:Debug>:_DEBUG>
     QT_NO_KEYWORDS
     QT_NO_CAST_FROM_BYTEARRAY
+    QT_IMPLICIT_QCHAR_CONSTRUCTION
 )
 
 if (DESKTOP_APP_DISABLE_CRASH_REPORTS)
diff --git a/variables.cmake b/variables.cmake
index 08b5bd9..23c38b8 100644
--- a/variables.cmake
+++ b/variables.cmake
@@ -32,6 +32,7 @@ option(DESKTOP_APP_DISABLE_AUTOUPDATE "Disable autoupdate." ${disable_autoupdate
 option(DESKTOP_APP_USE_HUNSPELL_ONLY "Disable system spellchecker and use bundled Hunspell only. (For debugging purposes)" OFF)
 option(DESKTOP_APP_USE_ENCHANT "Use Enchant instead of bundled Hunspell. (Linux only)" OFF)
 option(DESKTOP_APP_NO_PDB "Disable PDB file generation. (Windows only)" OFF)
+option(DESKTOP_APP_QT6 "Build with Qt 6" OFF)
 
 set(dont_bundle_fonts 0)
 if (DESKTOP_APP_USE_PACKAGED AND NOT DESKTOP_APP_USE_PACKAGED_LAZY)