diff --git a/INSTALL.txt b/INSTALL.txt
index 2b3f2713d..e54df150e 100644
--- a/INSTALL.txt
+++ b/INSTALL.txt
@@ -21,10 +21,9 @@ To start Fritzing on Windows: Wait until unzipping is finished. Then open the de
 ## Notes on Linux
 To start Fritzing double-click Fritzing, or try ./Fritzing in your shell window
 
-Fritzing uses the Qt5 libraries. On Ubuntu, they can be installed like this:
-
-"sudo apt install libqt5printsupport5 libqt5xml5 libqt5sql5 libqt5serialport5 libqt5sql5-sqlite".
+Fritzing uses the Qt6 libraries. On Ubuntu, they can be installed like this:
 
+"sudo apt install libqt6printsupport6 libqt6xml6 libqt6sql6 libqt6serialport6 libqt6sql6-sqlite
 ## Notes on macOS
 To start Fritzing on macOS double-click the Fritzing application
 
diff --git a/docker/Dockerfile.fedora b/docker/Dockerfile.fedora
index 933d7a81a..66f0af96a 100644
--- a/docker/Dockerfile.fedora
+++ b/docker/Dockerfile.fedora
@@ -1,13 +1,12 @@
-FROM fedora:30
+FROM fedora:39
 
 RUN dnf -y install cmake wget git flex bison libudev-devel
 RUN dnf -y install make gcc gcc-c++ kernel-devel ncurses-devel
 
 RUN dnf -y install openssl-devel zlib-devel libjpeg-devel libpng-devel bzip2 libgit2-devel boost-devel
-RUN dnf -y install xorg-x11-server-Xvfb qt-creator qt5-devel
+RUN dnf -y install xorg-x11-server-Xvfb qt-creator qt6-qtbase-devel qt6-qtserialport-devel qt6-qtsvg-devel
 
-RUN ln -s /usr/bin/qmake-qt5 /usr/bin/qmake
-RUN ln -s /usr/bin/lrelease-qt5 /usr/bin/lrelease
+RUN ln -s /usr/bin/lrelease-qt6 /usr/bin/lrelease
 
 RUN dnf clean all
 
@@ -23,8 +22,8 @@ WORKDIR /home/conan
 USER conan
 
 # No SHA verification for now. Will be automated by Conan in the future.
-RUN set -xe \
-    && wget -q -O - https://dl.bintray.com/boostorg/release/1.70.0/source/boost_1_70_0.tar.bz2 | tar xj
+# RUN set -xe \
+#     && wget -q -O - https://dl.bintray.com/boostorg/release/1.70.0/source/boost_1_70_0.tar.bz2 | tar xj
 
 RUN set -xe \
     && wget -q -O - https://github.com/libgit2/libgit2/archive/v0.28.1.tar.gz | tar xz \
diff --git a/tools/deploy_fritzing_mac.sh b/tools/deploy_fritzing_mac.sh
index 8323077e8..f2a816c3e 100755
--- a/tools/deploy_fritzing_mac.sh
+++ b/tools/deploy_fritzing_mac.sh
@@ -1,5 +1,5 @@
 #!/bin/bash -e
-QTBIN=/usr/local/opt/qt5/bin
+QTBIN=/usr/local/opt/qt6/bin
 
 # Go to this scripts directory and then one up
 toolsdir=$(dirname "${BASH_SOURCE[0]}")
diff --git a/tools/linguist_release.bat b/tools/linguist_release.bat
index ce514c295..2cc1304d8 100644
--- a/tools/linguist_release.bat
+++ b/tools/linguist_release.bat
@@ -1,3 +1,3 @@
 cd %~dp0
 cd ..
-C:\Qt\Qt5.6.2\5.6\msvc2013_64\bin\lrelease -removeidentical phoenix.pro
+C:\Qt\Qt6.5.3\5.3\msvc2013_64\bin\lrelease -removeidentical phoenix.pro
diff --git a/tools/linguist_translate.bat b/tools/linguist_translate.bat
index 16093e264..5be274104 100644
--- a/tools/linguist_translate.bat
+++ b/tools/linguist_translate.bat
@@ -1,3 +1,3 @@
 cd %~dp0
 cd ..
-C:\Qt\Qt5.6.2\5.6\msvc2013_64\bin\lupdate -noobsolete phoenix.pro
+C:\Qt\Qt6.5.3\5.3\msvc2013_64\bin\lupdate -noobsolete phoenix.pro
diff --git a/tools/qt_installer_noninteractive.qs b/tools/qt_installer_noninteractive.qs
index 7c61f555e..a5e19bb52 100644
--- a/tools/qt_installer_noninteractive.qs
+++ b/tools/qt_installer_noninteractive.qs
@@ -31,12 +31,12 @@ Controller.prototype.ComponentSelectionPageCallback = function() {
   var widget = gui.currentPageWidget();
 
   widget.deselectAll();
-  //widget.selectComponent("qt.qt5.5123.win32_msvc2017");
-  widget.selectComponent("qt.qt5.5127.win64_msvc2017_64");
+  //widget.selectComponent("qt.qt6.5123.win32_msvc2017");
+  widget.selectComponent("qt.qt6.5127.win64_msvc2017_64");
 
 // Cannot get older version of Qt qit Quick Scripts
 // Cannot programatically select LTS releases
-//  widget.selectComponent("qt.qt5.598.win64_msvc2017_64");
+//  widget.selectComponent("qt.qt6.598.win64_msvc2017_64");
 // Selecting invalid components results in installing just QtCreator.
 
   gui.clickButton(buttons.NextButton);
diff --git a/tools/release_fritzing.bat b/tools/release_fritzing.bat
index a8958c673..30d570202 100644
--- a/tools/release_fritzing.bat
+++ b/tools/release_fritzing.bat
@@ -118,15 +118,15 @@ echo.
 echo copy qt libraries
 copy %QTBIN%\libEGL.dll %DESTDIR%\deploy\libEGL.dll
 copy %QTBIN%\libGLESv2.dll %DESTDIR%\deploy\libGLESv2.dll
-copy %QTBIN%\Qt5Core.dll %DESTDIR%\deploy\Qt5Core.dll
-copy %QTBIN%\Qt5Gui.dll %DESTDIR%\deploy\Qt5Gui.dll
-copy %QTBIN%\Qt5Network.dll %DESTDIR%\deploy\Qt5Network.dll
-copy %QTBIN%\Qt5PrintSupport.dll %DESTDIR%\deploy\Qt5PrintSupport.dll
-copy %QTBIN%\Qt5Sql.dll %DESTDIR%\deploy\Qt5Sql.dll
-copy %QTBIN%\Qt5Svg.dll %DESTDIR%\deploy\Qt5Svg.dll
-copy %QTBIN%\Qt5Widgets.dll %DESTDIR%\deploy\Qt5Widgets.dll
-copy %QTBIN%\Qt5Xml.dll %DESTDIR%\deploy\Qt5Xml.dll
-copy %QTBIN%\Qt5SerialPort.dll %DESTDIR%\deploy\Qt5SerialPort.dll
+copy %QTBIN%\Qt6Core.dll %DESTDIR%\deploy\Qt6Core.dll
+copy %QTBIN%\Qt6Gui.dll %DESTDIR%\deploy\Qt6Gui.dll
+copy %QTBIN%\Qt6Network.dll %DESTDIR%\deploy\Qt6Network.dll
+copy %QTBIN%\Qt6PrintSupport.dll %DESTDIR%\deploy\Qt6PrintSupport.dll
+copy %QTBIN%\Qt6Sql.dll %DESTDIR%\deploy\Qt6Sql.dll
+copy %QTBIN%\Qt6Svg.dll %DESTDIR%\deploy\Qt6Svg.dll
+copy %QTBIN%\Qt6Widgets.dll %DESTDIR%\deploy\Qt6Widgets.dll
+copy %QTBIN%\Qt6Xml.dll %DESTDIR%\deploy\Qt6Xml.dll
+copy %QTBIN%\Qt6SerialPort.dll %DESTDIR%\deploy\Qt6SerialPort.dll
 
 xcopy /q %QTBIN%\icu*.dll %DESTDIR%\deploy /E  /I