diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 70fd667..8c1f79a 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -17,8 +17,8 @@ on:
       - develop
 
 jobs:
-  linux-qt5:
-    uses: lirios/.github/.github/workflows/build-linux-qt5.yml@master
+  linux-qt6:
+    uses: lirios/.github/.github/workflows/build-linux-qt6.yml@master
     with:
       build_dependencies: "cmake-shared fluid"
   windows:
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0505c1a..5956701 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.10.0)
+cmake_minimum_required(VERSION 3.19)
 
 project("Calculator"
     VERSION "1.3.0"
@@ -6,34 +6,15 @@ project("Calculator"
     LANGUAGES CXX C
 )
 
-## Shared macros and functions:
-if(CALCULATOR_WITH_FLUID AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/fluid/CMakeLists.txt")
-    set(LIRI_LOCAL_ECM TRUE)
-    set(FLUID_WITH_DOCUMENTATION FALSE)
-    set(FLUID_WITH_DEMO FALSE)
-endif()
-if(LIRI_LOCAL_ECM)
-    list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/fluid/cmake/shared/modules")
-else()
-    find_package(LiriCMakeShared "2.0.0" REQUIRED NO_MODULE)
-    list(APPEND CMAKE_MODULE_PATH "${LCS_MODULE_PATH}")
-endif()
+## Enable C++17:
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-## Set minimum versions required.
-set(QT_MIN_VERSION "5.10.0")
-
-## Liri specific setup common for all modules:
-include(LiriSetup)
-
-## Features:
-option(CALCULATOR_WITH_FLUID "Build together with Fluid" OFF)
-add_feature_info("Calculator::WithFluid" CALCULATOR_WITH_FLUID "Build together with Fluid")
-
-## Find Qt 5.
-find_package(Qt5 "${QT_MIN_VERSION}"
-    CONFIG REQUIRED
-    COMPONENTS
+## Find Qt:
+find_package(Qt6
+    REQUIRED COMPONENTS
         Core
+        Core5Compat
         Gui
         Widgets
         Svg
@@ -42,10 +23,8 @@ find_package(Qt5 "${QT_MIN_VERSION}"
         QuickControls2
         LinguistTools
 )
+qt_standard_project_setup(REQUIRES 6.6)
 
 ## Add subdirectories:
-if(CALCULATOR_WITH_FLUID)
-    add_subdirectory(fluid)
-endif()
 add_subdirectory(data)
 add_subdirectory(src)
diff --git a/README.md b/README.md
index 365bf4f..3016dc4 100644
--- a/README.md
+++ b/README.md
@@ -13,17 +13,15 @@ A cross-platform material design calculator.
 
 ## Dependencies
 
-Qt >= 5.10.0 with at least the following modules is required:
+Qt >= 6.6 with at least the following modules is required:
 
  * [qtbase](http://code.qt.io/cgit/qt/qtbase.git)
  * [qtdeclarative](http://code.qt.io/cgit/qt/qtdeclarative.git)
- * [qtquickcontrols2](http://code.qt.io/cgit/qt/qtquickcontrols2.git)
 
 The following modules and their dependencies are required:
 
- * [cmake](https://gitlab.kitware.com/cmake/cmake) >= 3.10.0
- * [cmake-shared](https://github.com/lirios/cmake-shared.git) >= 1.0.0
- * [fluid](https://github.com/lirios/fluid.git) >= 1.0.0
+ * [cmake](https://gitlab.kitware.com/cmake/cmake) >= 3.19.0
+ * [fluid](https://github.com/lirios/fluid.git) >= 2.0.0
 
 ## Installation
 
@@ -38,10 +36,6 @@ make install # use sudo if necessary
 Replace `/path/to/prefix` to your installation prefix.
 Default is `/usr/local`.
 
-You can also append the following options to the `cmake` command:
-
- * `-DCALCULATOR_WITH_FLUID:BOOL=ON`: Build with a local copy of the Fluid sources.
-
 ## Licensing
 
 Licensed under the terms of the GNU General Public License version 3 or, at your option, any later version.
diff --git a/data/CMakeLists.txt b/data/CMakeLists.txt
index d7dddc2..2838e11 100644
--- a/data/CMakeLists.txt
+++ b/data/CMakeLists.txt
@@ -6,7 +6,10 @@ if(UNIX AND NOT APPLE AND NOT ANDROID)
         get_filename_component(icon_directory "${icon_basename}" DIRECTORY)
         string(REPLACE "${icon_directory}/" "" icon_filename "${icon_basename}")
         string(REGEX REPLACE "\.(png|svg)" "" icon_filename "${icon_filename}")
-        set(dest_path "${INSTALL_DATADIR}/icons/hicolor/${icon_directory}/")
+        set(dest_path "${CMAKE_INSTALL_DATADIR}/icons/hicolor/${icon_directory}/")
         install(FILES "${source_path}" DESTINATION "${dest_path}")
     endforeach()
 endif()
+
+install(FILES io.liri.Calculator.appdata.xml DESTINATION "${CMAKE_INSTALL_DATADIR}/appdata")
+install(FILES io.liri.Calculator.desktop DESTINATION "${CMAKE_INSTALL_DATADIR}/applications")
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 7c1d67c..0cfb527 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,53 +1,66 @@
-# Translations
-file(GLOB LiriCalculator_TRANSLATIONS "${CMAKE_SOURCE_DIR}/translations/*_*.ts")
-qt5_add_translation(LiriCalculator_QM_FILES ${LiriCalculator_TRANSLATIONS})
-if(WIN32)
-    set(_translations_destdir "${CMAKE_CURRENT_BINARY_DIR}/translations")
-elseif(APPLE)
-    set(_translations_destdir "${CMAKE_CURRENT_BINARY_DIR}/Contents/Resources/data/translations")
-elseif(LINUX OR BSD)
-    set(_translations_destdir "${INSTALL_DATADIR}/liri-calculator/translations")
-endif()
-if(DEFINED _translations_destdir)
-    install(FILES ${LiriCalculator_QM_FILES} DESTINATION "${_translations_destdir}")
-endif()
+qt_add_executable(LiriCalculator
+    WIN32 MACOSX_BUNDLE
+    main/main.cpp
+    filehandler/filehandler.cpp filehandler/filehandler.h
+)
+
+qt_add_qml_module(LiriCalculator
+    URI Application
+    VERSION 2.0
+    QML_FILES
+        engine/qmldir
+        engine/math.js
+        engine/MathJs.qml
+        ui/qmldir
+        ui/ButtonsPanel.qml
+        ui/ButtonsView.qml
+        ui/CalculationLine.qml
+        ui/CalculationZone.qml
+        ui/HistoryPanel.qml
+        ui/Main.qml
+        ui/NavButton.qml
+        ui/Shortcuts.qml
+        ui/Styles.qml
+    RESOURCES
+        icons/icon.png
+)
+
+target_compile_definitions(LiriCalculator PRIVATE
+    QT_NO_CAST_FROM_ASCII
+    QT_NO_FOREACH
+)
+
+file(GLOB ts_files "../translations/*.ts")
+qt_add_translations(LiriCalculator
+    TS_FILES ${ts_files}
+    RESOURCE_PREFIX /qt/qml/Application/i18n
+)
+
+target_link_libraries(LiriCalculator
+    PRIVATE
+        Qt6::Core
+        Qt6::Core5Compat
+        Qt6::Gui
+        Qt6::Widgets
+        Qt6::Qml
+        Qt6::Quick
+        Qt6::QuickControls2
+)
 
 if(APPLE OR WIN32)
-    set(LiriCalculator_OUTPUT_NAME "LiriCalculator")
+    set_target_properties(LiriCalculator PROPERTIES OUTPUT_NAME "LiriCalculator")
 else()
-    set(LiriCalculator_OUTPUT_NAME "liri-calculator")
+    set_target_properties(LiriCalculator PROPERTIES OUTPUT_NAME "liri-calculator")
+endif()
+if(APPLE)
+    set_target_properties(LiriCalculator PROPERTIES
+        MACOSX_BUNDLE_GUI_IDENTIFIER "io.liri.Calculator"
+        MACOSX_BUNDLE_ICON_FILE "io.liri.Calculator"
+        MACOSX_BUNDLE_SHORT_VERSION_STRING "${PROJECT_VERSION}"
+    )
 endif()
 
-liri_add_executable(LiriCalculator
-    OUTPUT_NAME
-        "${LiriCalculator_OUTPUT_NAME}"
-    SOURCES
-        main/main.cpp
-        filehandler/filehandler.cpp
-        filehandler/filehandler.h
-        ${LiriCalculator_QM_FILES}
-    RESOURCES
-        calculator.qrc
-    DEFINES
-        QT_NO_CAST_FROM_ASCII
-        QT_NO_FOREACH
-    APPDATA
-        "${CMAKE_CURRENT_SOURCE_DIR}/../data/io.liri.Calculator.appdata.xml"
-    DESKTOP
-        "${CMAKE_CURRENT_SOURCE_DIR}/../data/io.liri.Calculator.desktop"
-    LIBRARIES
-        Qt5::Core
-        Qt5::Gui
-        Qt5::Widgets
-        Qt5::Qml
-        Qt5::Quick
-        Qt5::QuickControls2
-    GUI
+install(TARGETS LiriCalculator
+    BUNDLE  DESTINATION .
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
 )
-set_target_properties(LiriCalculator PROPERTIES
-    MACOSX_BUNDLE_GUI_IDENTIFIER "io.liri.Calculator"
-    MACOSX_BUNDLE_ICON_FILE "io.liri.Calculator"
-    MACOSX_BUNDLE_SHORT_VERSION_STRING "${PROJECT_VERSION}"
-)
-
-liri_finalize_executable(LiriCalculator)
diff --git a/src/calculator.qrc b/src/calculator.qrc
deleted file mode 100644
index 6b6395a..0000000
--- a/src/calculator.qrc
+++ /dev/null
@@ -1,18 +0,0 @@
-<RCC>
-    <qresource prefix="/">
-        <file>engine/math.js</file>
-        <file>engine/MathJs.qml</file>
-        <file>engine/qmldir</file>
-        <file>icons/icon.png</file>
-        <file>ui/ButtonsPanel.qml</file>
-        <file>ui/ButtonsView.qml</file>
-        <file>ui/CalculationLine.qml</file>
-        <file>ui/CalculationZone.qml</file>
-        <file>ui/HistoryPanel.qml</file>
-        <file>ui/Main.qml</file>
-        <file>ui/NavButton.qml</file>
-        <file>ui/qmldir</file>
-        <file>ui/Shortcuts.qml</file>
-        <file>ui/Styles.qml</file>
-    </qresource>
-</RCC>
diff --git a/src/filehandler/filehandler.cpp b/src/filehandler/filehandler.cpp
index fd62659..33c0f32 100644
--- a/src/filehandler/filehandler.cpp
+++ b/src/filehandler/filehandler.cpp
@@ -54,7 +54,8 @@ void FileHandler::load(const QUrl &fileUrl) {
         return;
     }
 
-    const QUrl path = QQmlFileSelector::get(engine)->selector()->select(fileUrl);
+    QQmlFileSelector* selector = new QQmlFileSelector(engine);
+    const QUrl path = selector->selector()->select(fileUrl);
     const QString fileName = QQmlFile::urlToLocalFileOrQrc(path);
     if (QFile::exists(fileName)) {
         QFile file(fileName);
@@ -102,3 +103,5 @@ QTextDocument *FileHandler::textDocument() const {
 
     return m_document->textDocument();
 }
+
+#include "moc_filehandler.cpp"
diff --git a/src/main/main.cpp b/src/main/main.cpp
index 8d49a40..8b14787 100644
--- a/src/main/main.cpp
+++ b/src/main/main.cpp
@@ -35,43 +35,30 @@
 
 #include "../filehandler/filehandler.h"
 
+using namespace Qt::StringLiterals;
+
 int main(int argc, char *argv[])
 {
     // Set Material Design QtQuick Controls 2 style
     QQuickStyle::setStyle(QStringLiteral("Material"));
 
-    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
-
     QApplication app(argc, argv);
     app.setOrganizationName(QStringLiteral("Liri"));
     app.setOrganizationDomain(QStringLiteral("liri.io"));
     app.setApplicationName(QStringLiteral("Calculator"));
-    app.setDesktopFileName(QStringLiteral("io.liri.Calculator.desktop"));
-    app.setWindowIcon(QIcon(QStringLiteral("qrc:/icons/icon.png")));
+    app.setDesktopFileName(QStringLiteral("io.liri.Calculator"));
+    app.setWindowIcon(QIcon(QStringLiteral(":/qt/icons/icon.png")));
 
-    // Load Translations
+    // Load Qt translations
     QTranslator qtTranslator;
-    qtTranslator.load(QStringLiteral("qt_") + QLocale::system().name(),
-                      QLibraryInfo::location(QLibraryInfo::TranslationsPath));
-    app.installTranslator(&qtTranslator);
+    if (qtTranslator.load(QLocale(), "qt"_L1, "_"_L1,
+                          QLibraryInfo::path(QLibraryInfo::TranslationsPath)))
+        app.installTranslator(&qtTranslator);
 
+    // Load translations from resources
     QTranslator translator;
-#if (defined Q_OS_LINUX)
-    const QString translationsPath = QStandardPaths::locate(
-        QStandardPaths::GenericDataLocation, QStringLiteral("liri-calculator/translations/"),
-        QStandardPaths::LocateDirectory);
-#elif (defined Q_OS_MACOS)
-    const QString translationsPath =
-        QDir(QCoreApplication::applicationDirPath())
-            .absoluteFilePath(QStringLiteral("../Resources/data/translations/"));
-#elif (defined Q_OS_WIN)
-    const QString translationsPath = QDir(QCoreApplication::applicationDirPath())
-                                         .absoluteFilePath(QStringLiteral("translations/"));
-#else
-#error "Platform not supported"
-#endif
-    if (translator.load(translationsPath + QStringLiteral("liri-calculator_") + QLocale::system().name()))
-        app.installTranslator(&translator);
+    if (translator.load(QLocale(), "liri-calculator"_L1, "_"_L1, ":/qt/qml/Application/i18n"_L1))
+        QCoreApplication::installTranslator(&translator);
 
     // Set the X11 WM_CLASS so X11 desktops can find the desktop file
     qputenv("RESOURCE_NAME", "io.liri.Calculator");
@@ -87,11 +74,16 @@ int main(int argc, char *argv[])
 
     qmlRegisterType<FileHandler>("filehandler", 1, 0, "FileHandler");
 
+    // Quit on error
+    QObject::connect(&engine, &QQmlApplicationEngine::objectCreationFailed,
+                     QCoreApplication::instance(), QCoreApplication::quit,
+                     Qt::QueuedConnection);
+
     // setup qml imports
     engine.addImportPath(QStringLiteral("qrc:/"));
 
     // load main ui
-    engine.load(QUrl(QStringLiteral("qrc:/ui/Main.qml")));
+    engine.loadFromModule("Application", "Main");
 
     return app.exec();
 }
diff --git a/src/ui/ButtonsPanel.qml b/src/ui/ButtonsPanel.qml
index 4cd9c0d..1e02b79 100644
--- a/src/ui/ButtonsPanel.qml
+++ b/src/ui/ButtonsPanel.qml
@@ -21,11 +21,11 @@
  * $END_LICENSE$
 */
 
-import QtQuick 2.7
-import QtQuick.Layouts 1.1
-import QtQuick.Controls 2.0
-import QtQuick.Controls.Material 2.0
-import Fluid.Controls 1.0
+import QtQuick
+import QtQuick.Layouts
+import QtQuick.Controls
+import QtQuick.Controls.Material
+import Fluid.Controls
 import ".."
 import "../engine"
 
@@ -44,14 +44,14 @@ Rectangle {
             color: styles.accentColor
             labels: ['sqrt','exp','log','cos','sin','tan','acos','asin','atan','π','∞','x10^']
             targets: ['sqrt(','exp(','log','cos(','sin(','tan(','acos(','asin(','atan(','pi','Infinity','e']
-            onButtonClicked: calculationZone.appendToFormula(strToAppend)
+            onButtonClicked: (strToAppend) => calculationZone.appendToFormula(strToAppend)
         }
 
         ButtonsView {
             color: Material.color(Material.Grey, Material.Shade900)
             labels: ['7', '8', '9', '←', '4', '5', '6', '^', '1', '2', '3', '!', '.', '0', '(', ')']
             targets: ['7', '8', '9', 'DEL', '4', '5', '6', '^', '1', '2', '3', '!', '.', '0', '(', ')']
-            onButtonClicked: calculationZone.appendToFormula(strToAppend)
+            onButtonClicked: (strToAppend) => calculationZone.appendToFormula(strToAppend)
             onButtonLongPressed: {
                 if (strToAppend === "DEL") {
                     calculationZone.clearFormula();
@@ -63,7 +63,7 @@ Rectangle {
             color: Material.color(Material.Grey, Material.Shade800)
             labels: ['+', '-', '×', '÷']
             targets: ['+', '-', '*', '/']
-            onButtonClicked: calculationZone.appendToFormula(strToAppend)
+            onButtonClicked: (strToAppend) => calculationZone.appendToFormula(strToAppend)
         }
     }
 }
diff --git a/src/ui/ButtonsView.qml b/src/ui/ButtonsView.qml
index 34248c8..8cc9631 100644
--- a/src/ui/ButtonsView.qml
+++ b/src/ui/ButtonsView.qml
@@ -21,11 +21,11 @@
  * $END_LICENSE$
 */
 
-import QtQuick 2.7
-import QtQuick.Layouts 1.1
-import QtQuick.Controls 2.0
-import QtQuick.Controls.Material 2.0
-import Fluid.Controls 1.0
+import QtQuick
+import QtQuick.Layouts
+import QtQuick.Controls
+import QtQuick.Controls.Material
+import Fluid.Controls
 import ".."
 
 
diff --git a/src/ui/CalculationLine.qml b/src/ui/CalculationLine.qml
index e840b03..c0f60f9 100644
--- a/src/ui/CalculationLine.qml
+++ b/src/ui/CalculationLine.qml
@@ -1,9 +1,8 @@
-import QtQuick 2.7
-import QtQuick.Layouts 1.3
-import QtQuick.Controls 2.0
-import QtQuick.Controls.Material 2.0
-import Fluid.Controls 1.0
-
+import QtQuick
+import QtQuick.Layouts
+import QtQuick.Controls
+import QtQuick.Controls.Material
+import Fluid.Controls
 
 Column {
     width: root.width
diff --git a/src/ui/CalculationZone.qml b/src/ui/CalculationZone.qml
index 537d432..9eefe98 100644
--- a/src/ui/CalculationZone.qml
+++ b/src/ui/CalculationZone.qml
@@ -1,9 +1,9 @@
-import QtQuick 2.7
-import QtQuick.Layouts 1.3
-import QtQuick.Controls 2.0
-import QtQuick.Controls.Material 2.0
-import Fluid.Controls 1.0
-import Fluid.Effects 1.0 as FluidEffects
+import QtQuick
+import QtQuick.Layouts
+import QtQuick.Controls
+import QtQuick.Controls.Material
+import Fluid.Controls
+import Fluid.Effects as FluidEffects
 
 Rectangle {
     id: calculationZone
diff --git a/src/ui/HistoryPanel.qml b/src/ui/HistoryPanel.qml
index 9b8700e..5c7aee6 100644
--- a/src/ui/HistoryPanel.qml
+++ b/src/ui/HistoryPanel.qml
@@ -21,11 +21,11 @@
  * $END_LICENSE$
 */
 
-import QtQuick 2.7
-import QtQuick.Layouts 1.1
-import QtQuick.Controls 2.0
-import QtQuick.Controls.Material 2.0
-import Fluid.Controls 1.0
+import QtQuick
+import QtQuick.Layouts
+import QtQuick.Controls
+import QtQuick.Controls.Material
+import Fluid.Controls
 import ".."
 import "../engine"
 
diff --git a/src/ui/Main.qml b/src/ui/Main.qml
index 9bf46c0..c89f0f5 100644
--- a/src/ui/Main.qml
+++ b/src/ui/Main.qml
@@ -21,15 +21,15 @@
  * $END_LICENSE$
 */
 
-import QtQuick 2.7
-import QtQuick.Layouts 1.1
-import QtQuick.Controls.Material 2.0
-import QtQuick.Controls 2.1
-import Fluid.Controls 1.0 as FluidControls
-import Fluid.Controls 1.0
-import Qt.labs.platform 1.0
-import Qt.labs.settings 1.0
-import filehandler 1.0
+import QtCore
+import QtQuick
+import QtQuick.Layouts
+import QtQuick.Controls.Material
+import QtQuick.Controls
+import Fluid.Controls as FluidControls
+import Fluid.Controls
+import Qt.labs.platform
+import filehandler
 import ".."
 import "../engine"
 
diff --git a/src/ui/NavButton.qml b/src/ui/NavButton.qml
index d7c00b2..a1ae056 100644
--- a/src/ui/NavButton.qml
+++ b/src/ui/NavButton.qml
@@ -1,8 +1,8 @@
-import QtQuick 2.7
-import QtQuick.Layouts 1.1
-import QtQuick.Controls 2.0
-import QtQuick.Controls.Material 2.0
-import Fluid.Controls 1.0 as FluidControls
+import QtQuick
+import QtQuick.Layouts
+import QtQuick.Controls
+import QtQuick.Controls.Material
+import Fluid.Controls as FluidControls
 
 FluidControls.ToolButton {
     implicitHeight: 40
diff --git a/src/ui/Shortcuts.qml b/src/ui/Shortcuts.qml
index 1a2986c..eaea1d7 100644
--- a/src/ui/Shortcuts.qml
+++ b/src/ui/Shortcuts.qml
@@ -1,4 +1,4 @@
-import QtQuick 2.7
+import QtQuick
 
 Item {
     Shortcut {
diff --git a/src/ui/Styles.qml b/src/ui/Styles.qml
index 5beb2cc..9852792 100644
--- a/src/ui/Styles.qml
+++ b/src/ui/Styles.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.0
-import QtQuick.Controls.Material 2.0
+import QtQuick
+import QtQuick.Controls.Material
 
 Item {
     // Colors