diff --git a/src/base/bittorrent/infohash.cpp b/src/base/bittorrent/infohash.cpp
index 35c2622da..7fa78b233 100644
--- a/src/base/bittorrent/infohash.cpp
+++ b/src/base/bittorrent/infohash.cpp
@@ -90,9 +90,13 @@ BitTorrent::TorrentID BitTorrent::TorrentID::fromInfoHash(const BitTorrent::Info
     return infoHash.toTorrentID();
 }
 
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+std::size_t BitTorrent::qHash(const BitTorrent::TorrentID &key, const std::size_t seed)
+#else
 uint BitTorrent::qHash(const BitTorrent::TorrentID &key, const uint seed)
+#endif
 {
-    return ::qHash(std::hash<TorrentID::UnderlyingType>()(key), seed);
+    return ::qHash(static_cast<TorrentID::BaseType>(key), seed);
 }
 
 bool BitTorrent::operator==(const BitTorrent::InfoHash &left, const BitTorrent::InfoHash &right)
diff --git a/src/base/bittorrent/infohash.h b/src/base/bittorrent/infohash.h
index dc1ac6a67..f6f3101a1 100644
--- a/src/base/bittorrent/infohash.h
+++ b/src/base/bittorrent/infohash.h
@@ -32,6 +32,7 @@
 #include <libtorrent/info_hash.hpp>
 #endif
 
+#include <QtGlobal>
 #include <QHash>
 #include <QMetaType>
 
@@ -81,7 +82,11 @@ namespace BitTorrent
         WrappedType m_nativeHash;
     };
 
-    uint qHash(const TorrentID &key, uint seed);
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+    std::size_t qHash(const TorrentID &key, std::size_t seed = 0);
+#else
+    uint qHash(const TorrentID &key, uint seed = 0);
+#endif
 
     bool operator==(const InfoHash &left, const InfoHash &right);
     bool operator!=(const InfoHash &left, const InfoHash &right);
diff --git a/src/base/bittorrent/ltqhash.h b/src/base/bittorrent/ltqhash.h
index ad0625c62..b8a929b32 100644
--- a/src/base/bittorrent/ltqhash.h
+++ b/src/base/bittorrent/ltqhash.h
@@ -28,23 +28,24 @@
 
 #pragma once
 
+#include <QtGlobal>
+
+#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
 #include <functional>
 
 #include <libtorrent/units.hpp>
 
 #include <QHash>
 
-// From https://doc.qt.io/qt-6/qhash.html#the-hashing-function:
-// A hashing function for a key type K may be provided in two different ways.
-// The first way is by having an overload of qHash() in K's namespace.
 namespace libtorrent
 {
     namespace aux
     {
         template <typename T, typename Tag>
-        uint qHash(const strong_typedef<T, Tag> &key, const uint seed)
+        uint qHash(const strong_typedef<T, Tag> &key, const uint seed = 0)
         {
             return ::qHash((std::hash<strong_typedef<T, Tag>> {})(key), seed);
         }
     }
 }
+#endif
diff --git a/src/base/bittorrent/peeraddress.cpp b/src/base/bittorrent/peeraddress.cpp
index ebe73d637..3785bfbf5 100644
--- a/src/base/bittorrent/peeraddress.cpp
+++ b/src/base/bittorrent/peeraddress.cpp
@@ -77,7 +77,14 @@ bool BitTorrent::operator==(const BitTorrent::PeerAddress &left, const BitTorren
     return (left.ip == right.ip) && (left.port == right.port);
 }
 
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+std::size_t BitTorrent::qHash(const BitTorrent::PeerAddress &addr, const std::size_t seed)
+{
+    return qHashMulti(seed, addr.ip, addr.port);
+}
+#else
 uint BitTorrent::qHash(const BitTorrent::PeerAddress &addr, const uint seed)
 {
     return (::qHash(addr.ip, seed) ^ ::qHash(addr.port));
 }
+#endif
diff --git a/src/base/bittorrent/peeraddress.h b/src/base/bittorrent/peeraddress.h
index 3d7e5b391..9f1e7d0a7 100644
--- a/src/base/bittorrent/peeraddress.h
+++ b/src/base/bittorrent/peeraddress.h
@@ -28,6 +28,7 @@
 
 #pragma once
 
+#include <QtGlobal>
 #include <QHostAddress>
 
 class QString;
@@ -44,5 +45,9 @@ namespace BitTorrent
     };
 
     bool operator==(const PeerAddress &left, const PeerAddress &right);
-    uint qHash(const PeerAddress &addr, uint seed);
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+    std::size_t qHash(const PeerAddress &addr, std::size_t seed = 0);
+#else
+    uint qHash(const PeerAddress &addr, uint seed = 0);
+#endif
 }
diff --git a/src/base/bittorrent/torrent.cpp b/src/base/bittorrent/torrent.cpp
index 700011461..e478eabfd 100644
--- a/src/base/bittorrent/torrent.cpp
+++ b/src/base/bittorrent/torrent.cpp
@@ -35,7 +35,11 @@
 
 namespace BitTorrent
 {
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+    std::size_t qHash(const TorrentState key, const std::size_t seed)
+#else
     uint qHash(const TorrentState key, const uint seed)
+#endif
     {
         return ::qHash(static_cast<std::underlying_type_t<TorrentState>>(key), seed);
     }
diff --git a/src/base/bittorrent/torrent.h b/src/base/bittorrent/torrent.h
index 526255b88..453013233 100644
--- a/src/base/bittorrent/torrent.h
+++ b/src/base/bittorrent/torrent.h
@@ -29,6 +29,7 @@
 
 #pragma once
 
+#include <QtGlobal>
 #include <QtContainerFwd>
 #include <QMetaType>
 #include <QString>
@@ -97,7 +98,11 @@ namespace BitTorrent
         Error
     };
 
-    uint qHash(TorrentState key, uint seed);
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+    std::size_t qHash(TorrentState key, std::size_t seed = 0);
+#else
+    uint qHash(TorrentState key, uint seed = 0);
+#endif
 
     class Torrent : public AbstractFileStorage
     {
diff --git a/src/base/bittorrent/tracker.cpp b/src/base/bittorrent/tracker.cpp
index 0c6f35ec3..a811502ec 100644
--- a/src/base/bittorrent/tracker.cpp
+++ b/src/base/bittorrent/tracker.cpp
@@ -140,7 +140,11 @@ namespace BitTorrent
         return !(left == right);
     }
 
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+    std::size_t qHash(const Peer &key, const std::size_t seed)
+#else
     uint qHash(const Peer &key, const uint seed)
+#endif
     {
         return qHash(key.uniqueID(), seed);
     }
diff --git a/src/base/bittorrent/tracker.h b/src/base/bittorrent/tracker.h
index 2d007961e..6e502c075 100644
--- a/src/base/bittorrent/tracker.h
+++ b/src/base/bittorrent/tracker.h
@@ -34,6 +34,7 @@
 
 #include <libtorrent/entry.hpp>
 
+#include <QtGlobal>
 #include <QHash>
 #include <QObject>
 #include <QSet>
@@ -64,7 +65,11 @@ namespace BitTorrent
 
     bool operator==(const Peer &left, const Peer &right);
     bool operator!=(const Peer &left, const Peer &right);
-    uint qHash(const Peer &key, uint seed);
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+    std::size_t qHash(const Peer &key, std::size_t seed = 0);
+#else
+    uint qHash(const Peer &key, uint seed = 0);
+#endif
 
     // *Basic* Bittorrent tracker implementation
     // [BEP-3] The BitTorrent Protocol Specification
diff --git a/src/base/bittorrent/trackerentry.cpp b/src/base/bittorrent/trackerentry.cpp
index 622678022..679029317 100644
--- a/src/base/bittorrent/trackerentry.cpp
+++ b/src/base/bittorrent/trackerentry.cpp
@@ -36,7 +36,14 @@ bool BitTorrent::operator==(const TrackerEntry &left, const TrackerEntry &right)
         && QUrl(left.url) == QUrl(right.url));
 }
 
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+std::size_t BitTorrent::qHash(const TrackerEntry &key, const std::size_t seed)
+{
+    return qHashMulti(seed, key.url, key.tier);
+}
+#else
 uint BitTorrent::qHash(const TrackerEntry &key, const uint seed)
 {
     return (::qHash(key.url, seed) ^ ::qHash(key.tier));
 }
+#endif
diff --git a/src/base/bittorrent/trackerentry.h b/src/base/bittorrent/trackerentry.h
index ede17cb52..61649fd7b 100644
--- a/src/base/bittorrent/trackerentry.h
+++ b/src/base/bittorrent/trackerentry.h
@@ -71,5 +71,9 @@ namespace BitTorrent
     };
 
     bool operator==(const TrackerEntry &left, const TrackerEntry &right);
-    uint qHash(const TrackerEntry &key, uint seed);
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+    std::size_t qHash(const TrackerEntry &key, std::size_t seed = 0);
+#else
+    uint qHash(const TrackerEntry &key, uint seed = 0);
+#endif
 }
diff --git a/src/base/digest32.h b/src/base/digest32.h
index bf007f9d3..111f82e60 100644
--- a/src/base/digest32.h
+++ b/src/base/digest32.h
@@ -30,6 +30,7 @@
 
 #include <libtorrent/sha1_hash.hpp>
 
+#include <QtGlobal>
 #include <QByteArray>
 #include <QHash>
 #include <QSharedData>
@@ -130,8 +131,16 @@ bool operator<(const Digest32<N> &left, const Digest32<N> &right)
             < static_cast<typename Digest32<N>::UnderlyingType>(right);
 }
 
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
 template <int N>
-uint qHash(const Digest32<N> &key, const uint seed)
+std::size_t qHash(const Digest32<N> &key, const std::size_t seed = 0)
 {
-    return ::qHash(std::hash<typename Digest32<N>::UnderlyingType>()(key), seed);
+    return ::qHash(static_cast<typename Digest32<N>::UnderlyingType>(key), seed);
 }
+#else
+template <int N>
+uint qHash(const Digest32<N> &key, const uint seed = 0)
+{
+    return static_cast<uint>((std::hash<typename Digest32<N>::UnderlyingType> {})(key)) ^ seed;
+}
+#endif
diff --git a/src/base/net/downloadmanager.cpp b/src/base/net/downloadmanager.cpp
index 2a348e079..872fcaecf 100644
--- a/src/base/net/downloadmanager.cpp
+++ b/src/base/net/downloadmanager.cpp
@@ -364,10 +364,17 @@ Net::ServiceID Net::ServiceID::fromURL(const QUrl &url)
     return {url.host(), url.port(80)};
 }
 
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+std::size_t Net::qHash(const ServiceID &serviceID, const std::size_t seed)
+{
+    return qHashMulti(seed, serviceID.hostName, serviceID.port);
+}
+#else
 uint Net::qHash(const ServiceID &serviceID, const uint seed)
 {
     return ::qHash(serviceID.hostName, seed) ^ ::qHash(serviceID.port);
 }
+#endif
 
 bool Net::operator==(const ServiceID &lhs, const ServiceID &rhs)
 {
diff --git a/src/base/net/downloadmanager.h b/src/base/net/downloadmanager.h
index 2dea1c162..32fcab175 100644
--- a/src/base/net/downloadmanager.h
+++ b/src/base/net/downloadmanager.h
@@ -29,6 +29,7 @@
 
 #pragma once
 
+#include <QtGlobal>
 #include <QHash>
 #include <QNetworkAccessManager>
 #include <QObject>
@@ -52,7 +53,11 @@ namespace Net
         static ServiceID fromURL(const QUrl &url);
     };
 
-    uint qHash(const ServiceID &serviceID, uint seed);
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+    std::size_t qHash(const ServiceID &serviceID, std::size_t seed = 0);
+#else
+    uint qHash(const ServiceID &serviceID, uint seed = 0);
+#endif
     bool operator==(const ServiceID &lhs, const ServiceID &rhs);
 
     enum class DownloadStatus
diff --git a/src/base/path.cpp b/src/base/path.cpp
index da7881993..a7675fb68 100644
--- a/src/base/path.cpp
+++ b/src/base/path.cpp
@@ -332,7 +332,11 @@ QDataStream &operator>>(QDataStream &in, Path &path)
     return in;
 }
 
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+std::size_t qHash(const Path &key, const std::size_t seed)
+#else
 uint qHash(const Path &key, const uint seed)
+#endif
 {
     return ::qHash(key.data(), seed);
 }
diff --git a/src/base/path.h b/src/base/path.h
index 614ba640f..fb2b97c2f 100644
--- a/src/base/path.h
+++ b/src/base/path.h
@@ -29,6 +29,7 @@
 
 #pragma once
 
+#include <QtGlobal>
 #include <QMetaType>
 #include <QString>
 
@@ -96,4 +97,8 @@ Path operator+(const Path &lhs, const std::string &rhs);
 QDataStream &operator<<(QDataStream &out, const Path &path);
 QDataStream &operator>>(QDataStream &in, Path &path);
 
-uint qHash(const Path &key, uint seed);
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+std::size_t qHash(const Path &key, std::size_t seed = 0);
+#else
+uint qHash(const Path &key, uint seed = 0);
+#endif
diff --git a/src/gui/properties/peerlistwidget.cpp b/src/gui/properties/peerlistwidget.cpp
index 276fda56a..96d81008d 100644
--- a/src/gui/properties/peerlistwidget.cpp
+++ b/src/gui/properties/peerlistwidget.cpp
@@ -30,6 +30,7 @@
 
 #include <algorithm>
 
+#include <QtGlobal>
 #include <QApplication>
 #include <QClipboard>
 #include <QHeaderView>
@@ -70,10 +71,17 @@ bool operator==(const PeerEndpoint &left, const PeerEndpoint &right)
     return (left.address == right.address) && (left.connectionType == right.connectionType);
 }
 
-uint qHash(const PeerEndpoint &peerEndpoint, const uint seed)
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+std::size_t qHash(const PeerEndpoint &peerEndpoint, const std::size_t seed = 0)
+{
+    return qHashMulti(seed, peerEndpoint.address, peerEndpoint.connectionType);
+}
+#else
+uint qHash(const PeerEndpoint &peerEndpoint, const uint seed = 0)
 {
     return (qHash(peerEndpoint.address, seed) ^ ::qHash(peerEndpoint.connectionType));
 }
+#endif
 
 PeerListWidget::PeerListWidget(PropertiesWidget *parent)
     : QTreeView(parent)