diff --git a/src/chatdocumenthandler.cpp b/src/chatdocumenthandler.cpp
index c6a8dbddd..b6d328d40 100644
--- a/src/chatdocumenthandler.cpp
+++ b/src/chatdocumenthandler.cpp
@@ -134,7 +134,7 @@ int ChatDocumentHandler::completionStartIndex() const
         return 0;
     }
 
-#if !defined(Q_OS_ANDROID) && QT_VERSION > QT_VERSION_CHECK(6, 0, 0)
+#if !defined(Q_OS_ANDROID)
     const long long cursor = cursorPosition();
 #else
     const auto cursor = cursorPosition();
diff --git a/src/controller.cpp b/src/controller.cpp
index e393547fb..c5bd7ba0e 100644
--- a/src/controller.cpp
+++ b/src/controller.cpp
@@ -4,11 +4,7 @@
 
 #include "controller.h"
 
-#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
-#include <qt5keychain/keychain.h>
-#else
 #include <qt6keychain/keychain.h>
-#endif
 
 #include <KConfig>
 #include <KConfigGroup>
diff --git a/src/main.cpp b/src/main.cpp
index 0005d910e..28f1b5c9e 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -140,19 +140,13 @@ Q_DECL_EXPORT
 #endif
 int main(int argc, char *argv[])
 {
-#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
-    QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
-#endif
-
     QNetworkProxyFactory::setUseSystemConfiguration(true);
 
 #ifdef HAVE_WEBVIEW
     QtWebView::initialize();
     QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts);
-#if QT_VERSION > QT_VERSION_CHECK(6, 0, 0)
     QQuickWindow::setGraphicsApi(QSGRendererInterface::OpenGLRhi);
 #endif
-#endif
 
 #ifdef Q_OS_ANDROID
     QGuiApplication app(argc, argv);
@@ -311,10 +305,6 @@ int main(int argc, char *argv[])
         return engine->toScriptValue(LocationHelper());
     });
 
-#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
-    qRegisterMetaTypeStreamOperators<Emoji>();
-#endif
-
     QQmlApplicationEngine engine;
 
 #ifdef HAVE_KDBUSADDONS
diff --git a/src/models/completionproxymodel.cpp b/src/models/completionproxymodel.cpp
index 49fc46a14..4dacd1a12 100644
--- a/src/models/completionproxymodel.cpp
+++ b/src/models/completionproxymodel.cpp
@@ -22,11 +22,7 @@ bool CompletionProxyModel::filterAcceptsRow(int sourceRow, const QModelIndex &so
             && sourceModel()
                    ->data(sourceModel()->index(sourceRow, 0), secondaryFilterRole())
                    .toString()
-#if QT_VERSION > QT_VERSION_CHECK(6, 0, 0)
                    .startsWith(QStringView(m_filterText).sliced(1), Qt::CaseInsensitive));
-#else
-                   .startsWith(m_filterText.midRef(1), Qt::CaseInsensitive));
-#endif
 }
 
 bool CompletionProxyModel::lessThan(const QModelIndex &source_left, const QModelIndex &source_right) const
diff --git a/src/neochatconnection.cpp b/src/neochatconnection.cpp
index d76313652..e98871677 100644
--- a/src/neochatconnection.cpp
+++ b/src/neochatconnection.cpp
@@ -10,11 +10,7 @@
 #include "jobs/neochatdeactivateaccountjob.h"
 #include "roommanager.h"
 
-#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
-#include <qt5keychain/keychain.h>
-#else
 #include <qt6keychain/keychain.h>
-#endif
 
 #include <KLocalizedString>
 
diff --git a/src/neochatroom.cpp b/src/neochatroom.cpp
index 53526126e..2fd79fc30 100644
--- a/src/neochatroom.cpp
+++ b/src/neochatroom.cpp
@@ -178,17 +178,9 @@ QCoro::Task<void> NeoChatRoom::doUploadFile(QUrl url, QString body)
         content = new EventContent::AudioContent(url, fileInfo.size(), mime, fileInfo.fileName());
     } else if (mime.name().startsWith("video/"_ls)) {
         QMediaPlayer player;
-#if QT_VERSION > QT_VERSION_CHECK(6, 0, 0)
         player.setSource(url);
-#else
-        player.setMedia(url);
-#endif
         co_await qCoro(&player, &QMediaPlayer::mediaStatusChanged);
-#if QT_VERSION > QT_VERSION_CHECK(6, 0, 0)
         auto resolution = player.metaData().value(QMediaMetaData::Resolution).toSize();
-#else
-        auto resolution = player.metaData(QMediaMetaData::Resolution).toSize();
-#endif
         content = new EventContent::VideoContent(url, fileInfo.size(), mime, resolution, fileInfo.fileName());
     } else {
         content = new EventContent::FileContent(url, fileInfo.size(), mime, fileInfo.fileName());
diff --git a/src/trayicon_sni.cpp b/src/trayicon_sni.cpp
index 8ca0c7a4f..045521c74 100644
--- a/src/trayicon_sni.cpp
+++ b/src/trayicon_sni.cpp
@@ -17,11 +17,7 @@ TrayIcon::TrayIcon(QObject *parent)
     });
 
     connect(&WindowController::instance(), &WindowController::windowChanged, this, [this] {
-#if QT_VERSION > QT_VERSION_CHECK(6, 0, 0)
         setAssociatedWindow(WindowController::instance().window());
-#else
-        Q_UNUSED(this);
-#endif
     });
 }