diff --git a/CMakeLists.txt b/CMakeLists.txt
index c639e7d98..063c169f2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,7 +12,8 @@ project(qBittorrent
 set(CMAKE_FIND_PACKAGE_PREFER_CONFIG ON)
 # version requirements - older versions may work, but you are on your own
 set(minBoostVersion 1.65)
-set(minQtVersion 5.15.2)
+set(minQt5Version 5.15.2)
+set(minQt6Version 6.2)
 set(minOpenSSLVersion 1.1.1)
 set(minLibtorrent1Version 1.2.14)
 set(minLibtorrentVersion 2.0.4)
@@ -22,6 +23,7 @@ set(minZlibVersion 1.2.11)
 include(CheckCXXSourceCompiles) # TODO: migrate to CheckSourceCompiles in CMake >= 3.19
 include(FeatureSummary)
 include(FeatureOptionsSetup)
+feature_option(QT6 "Use Qt6" OFF)
 feature_option(STACKTRACE "Enable stacktraces" ON)
 feature_option(GUI "Build GUI application" ON)
 feature_option(WEBUI "Enables built-in HTTP server for headless use" ON)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index d22c93a27..fd90de4b7 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -43,13 +43,24 @@ set_property(CACHE LibtorrentRasterbar_DIR PROPERTY TYPE PATH)
 find_package(Boost ${minBoostVersion} REQUIRED)
 find_package(OpenSSL ${minOpenSSLVersion} REQUIRED)
 find_package(ZLIB ${minZlibVersion} REQUIRED)
-find_package(Qt5 ${minQtVersion} REQUIRED COMPONENTS Core Network Sql Xml LinguistTools)
-if (DBUS)
-    find_package(Qt5 ${minQtVersion} REQUIRED COMPONENTS DBus)
-    set_package_properties(Qt5DBus PROPERTIES
-        DESCRIPTION "Qt5 module for inter-process communication over the D-Bus protocol"
-        PURPOSE "Required by the DBUS feature"
-    )
+if (QT6)
+    find_package(Qt6 ${minQt6Version} REQUIRED COMPONENTS Core Network Sql Xml LinguistTools)
+    if (DBUS)
+        find_package(Qt6 ${minQt6Version} REQUIRED COMPONENTS DBus)
+        set_package_properties(Qt6DBus PROPERTIES
+            DESCRIPTION "Qt6 module for inter-process communication over the D-Bus protocol"
+            PURPOSE "Required by the DBUS feature"
+        )
+    endif()
+else()
+    find_package(Qt5 ${minQt5Version} REQUIRED COMPONENTS Core Network Sql Xml LinguistTools)
+    if (DBUS)
+        find_package(Qt5 ${minQt5Version} REQUIRED COMPONENTS DBus)
+        set_package_properties(Qt5DBus PROPERTIES
+            DESCRIPTION "Qt5 module for inter-process communication over the D-Bus protocol"
+            PURPOSE "Required by the DBUS feature"
+        )
+    endif()
 endif()
 
 # automatically call Qt moc, rcc and uic as needed for all targets by default
@@ -68,10 +79,15 @@ include_directories(${CMAKE_CURRENT_SOURCE_DIR})
 add_subdirectory(base)
 
 if (GUI)
-    find_package(Qt5 ${minQtVersion} REQUIRED COMPONENTS Widgets Svg)
-    if (CMAKE_SYSTEM_NAME STREQUAL "Windows")
-        find_package(Qt5 ${minQtVersion} REQUIRED COMPONENTS WinExtras)
+    if (QT6)
+        find_package(Qt6 ${minQt6Version} REQUIRED COMPONENTS Widgets Svg)
+    else()
+        find_package(Qt5 ${minQt5Version} REQUIRED COMPONENTS Widgets Svg)
+        if (CMAKE_SYSTEM_NAME STREQUAL "Windows")
+            find_package(Qt5 ${minQt5Version} REQUIRED COMPONENTS WinExtras)
+        endif()
     endif()
+
     add_subdirectory(gui)
 endif()
 
diff --git a/src/app/CMakeLists.txt b/src/app/CMakeLists.txt
index c43600fdd..8d7a297e5 100644
--- a/src/app/CMakeLists.txt
+++ b/src/app/CMakeLists.txt
@@ -4,14 +4,14 @@
 # Based on https://gist.github.com/giraldeau/546ba5512a74dfe9d8ea0862d66db412
 file(GLOB QBT_TS_FILES "${qBittorrent_SOURCE_DIR}/src/lang/*.ts")
 set_source_files_properties(${QBT_TS_FILES} PROPERTIES OUTPUT_LOCATION "${qBittorrent_BINARY_DIR}/src/lang")
-qt5_add_translation(QBT_QM_FILES ${QBT_TS_FILES} OPTIONS -silent)
+qt_add_translation(QBT_QM_FILES ${QBT_TS_FILES} OPTIONS -silent)
 configure_file("${qBittorrent_SOURCE_DIR}/src/lang/lang.qrc" "${qBittorrent_BINARY_DIR}/src/lang/lang.qrc" COPYONLY)
 
 if (WEBUI)
     file(GLOB QBT_WEBUI_TS_FILES "${qBittorrent_SOURCE_DIR}/src/webui/www/translations/*.ts")
     set_source_files_properties(${QBT_WEBUI_TS_FILES}
         PROPERTIES OUTPUT_LOCATION "${qBittorrent_BINARY_DIR}/src/webui/www/translations")
-    qt5_add_translation(QBT_WEBUI_QM_FILES ${QBT_WEBUI_TS_FILES} OPTIONS -silent)
+    qt_add_translation(QBT_WEBUI_QM_FILES ${QBT_WEBUI_TS_FILES} OPTIONS -silent)
     configure_file("${qBittorrent_SOURCE_DIR}/src/webui/www/translations/webui_translations.qrc"
         "${qBittorrent_BINARY_DIR}/src/webui/www/translations/webui_translations.qrc" COPYONLY)
 endif()
@@ -139,7 +139,7 @@ endif()
 if (GUI)
     target_link_libraries(qbt_app PRIVATE qbt_gui)
     if ((CMAKE_SYSTEM_NAME STREQUAL "Windows") OR (CMAKE_SYSTEM_NAME STREQUAL "Darwin"))
-        qt_import_plugins(qbt_app INCLUDE Qt5::QSvgIconPlugin Qt5::QSvgPlugin)
+        qt_import_plugins(qbt_app INCLUDE Qt::QSvgIconPlugin Qt::QSvgPlugin)
     endif()
 endif()
 
diff --git a/src/base/CMakeLists.txt b/src/base/CMakeLists.txt
index 8274330da..67238b4e8 100644
--- a/src/base/CMakeLists.txt
+++ b/src/base/CMakeLists.txt
@@ -177,7 +177,7 @@ target_link_libraries(qbt_base
         ZLIB::ZLIB
     PUBLIC
         LibtorrentRasterbar::torrent-rasterbar
-        Qt5::Core Qt5::Network Qt5::Sql Qt5::Xml
+        Qt::Core Qt::Network Qt::Sql Qt::Xml
         qbt_common_cfg
 )
 
@@ -204,5 +204,5 @@ if (NOT WEBUI)
 endif()
 
 if (DBUS)
-    target_link_libraries(qbt_base PUBLIC Qt5::DBus)
+    target_link_libraries(qbt_base PUBLIC Qt::DBus)
 endif()
diff --git a/src/gui/CMakeLists.txt b/src/gui/CMakeLists.txt
index 78e899798..882e28f8f 100644
--- a/src/gui/CMakeLists.txt
+++ b/src/gui/CMakeLists.txt
@@ -199,7 +199,7 @@ target_link_libraries(qbt_gui
     PRIVATE
         qbt_base
     PUBLIC
-        Qt5::Gui Qt5::Widgets
+        Qt::Gui Qt::Widgets
 )
 
 if (DBUS)
@@ -219,10 +219,10 @@ if ((CMAKE_SYSTEM_NAME STREQUAL "Windows") OR (CMAKE_SYSTEM_NAME STREQUAL "Darwi
 endif()
 
 if (CMAKE_SYSTEM_NAME STREQUAL "Windows")
-    target_link_libraries(qbt_gui PRIVATE
-        Qt5::WinExtras
-        PowrProf
-    )
+    target_link_libraries(qbt_gui PRIVATE PowrProf)
+    if (NOT QT6)
+        target_link_libraries(qbt_gui PRIVATE Qt5::WinExtras)
+    endif()
 endif()
 
 if (CMAKE_SYSTEM_NAME STREQUAL "Darwin")
@@ -230,7 +230,5 @@ if (CMAKE_SYSTEM_NAME STREQUAL "Darwin")
         macutilities.h
         macutilities.mm
     )
-    target_link_libraries(qbt_gui PRIVATE
-        objc
-    )
+    target_link_libraries(qbt_gui PRIVATE objc)
 endif()
diff --git a/src/gui/mainwindow.cpp b/src/gui/mainwindow.cpp
index cac39e4e0..691039586 100644
--- a/src/gui/mainwindow.cpp
+++ b/src/gui/mainwindow.cpp
@@ -55,7 +55,6 @@
 
 #include "base/bittorrent/session.h"
 #include "base/bittorrent/sessionstatus.h"
-#include "base/bittorrent/torrent.h"
 #include "base/global.h"
 #include "base/logger.h"
 #include "base/net/downloadmanager.h"
diff --git a/src/gui/mainwindow.h b/src/gui/mainwindow.h
index 8fa089adb..12d56ed83 100644
--- a/src/gui/mainwindow.h
+++ b/src/gui/mainwindow.h
@@ -35,6 +35,8 @@
 #include <QSystemTrayIcon>
 #endif
 
+#include "base/bittorrent/torrent.h"
+
 class QCloseEvent;
 class QFileSystemWatcher;
 class QSplitter;
@@ -57,11 +59,6 @@ class TorrentCreatorDialog;
 class TransferListFiltersWidget;
 class TransferListWidget;
 
-namespace BitTorrent
-{
-    class Torrent;
-}
-
 namespace Net
 {
     struct DownloadResult;
diff --git a/src/gui/transferlistfilterswidget.cpp b/src/gui/transferlistfilterswidget.cpp
index 7210fcef5..042e955b2 100644
--- a/src/gui/transferlistfilterswidget.cpp
+++ b/src/gui/transferlistfilterswidget.cpp
@@ -38,10 +38,8 @@
 #include <QUrl>
 #include <QVBoxLayout>
 
-#include "base/bittorrent/infohash.h"
 #include "base/bittorrent/session.h"
 #include "base/bittorrent/torrent.h"
-#include "base/bittorrent/trackerentry.h"
 #include "base/global.h"
 #include "base/logger.h"
 #include "base/net/downloadmanager.h"
diff --git a/src/gui/transferlistfilterswidget.h b/src/gui/transferlistfilterswidget.h
index b47077ead..0a0f39491 100644
--- a/src/gui/transferlistfilterswidget.h
+++ b/src/gui/transferlistfilterswidget.h
@@ -32,6 +32,9 @@
 #include <QListWidget>
 #include <QtContainerFwd>
 
+#include "base/bittorrent/infohash.h"
+#include "base/bittorrent/trackerentry.h"
+
 class QCheckBox;
 class QResizeEvent;
 
@@ -40,8 +43,6 @@ class TransferListWidget;
 namespace BitTorrent
 {
     class Torrent;
-    class TorrentID;
-    struct TrackerEntry;
 }
 
 namespace Net
diff --git a/src/gui/transferlistwidget.cpp b/src/gui/transferlistwidget.cpp
index fba5468ae..e42a144c9 100644
--- a/src/gui/transferlistwidget.cpp
+++ b/src/gui/transferlistwidget.cpp
@@ -44,7 +44,6 @@
 #include <QWheelEvent>
 
 #include "base/bittorrent/common.h"
-#include "base/bittorrent/infohash.h"
 #include "base/bittorrent/session.h"
 #include "base/bittorrent/torrent.h"
 #include "base/bittorrent/trackerentry.h"
diff --git a/src/gui/transferlistwidget.h b/src/gui/transferlistwidget.h
index ef1400e3b..9257ea15b 100644
--- a/src/gui/transferlistwidget.h
+++ b/src/gui/transferlistwidget.h
@@ -29,9 +29,12 @@
 #pragma once
 
 #include <functional>
+
 #include <QtContainerFwd>
 #include <QTreeView>
 
+#include "base/bittorrent/infohash.h"
+
 class MainWindow;
 class TransferListModel;
 class TransferListSortModel;
@@ -39,7 +42,6 @@ class TransferListSortModel;
 namespace BitTorrent
 {
     class Torrent;
-    class TorrentID;
 }
 
 enum class CopyInfohashPolicy
diff --git a/src/src.pro b/src/src.pro
index 8e87c56c9..1ba2f49fc 100644
--- a/src/src.pro
+++ b/src/src.pro
@@ -23,7 +23,7 @@ nogui {
         DEFINES += QBT_STATIC_QT
         QTPLUGIN += qico
     }
-    win32 {
+    win32: lessThan(QT_VERSION_MAJOR, 6) {
         QT += winextras
     }
     macx {