diff --git a/Project/QtCreator/qctools-cli/qctools-cli.pro b/Project/QtCreator/qctools-cli/qctools-cli.pro
index 830268ba1..c1862cf2e 100644
--- a/Project/QtCreator/qctools-cli/qctools-cli.pro
+++ b/Project/QtCreator/qctools-cli/qctools-cli.pro
@@ -3,7 +3,7 @@ message('entering qctools-cli.pro')
 QT += core network
 QT -= gui
 
-CONFIG += c++11
+CONFIG += c++17
 
 TARGET = qcli
 CONFIG += console
diff --git a/Project/QtCreator/qctools-gui/qctools-gui.pro b/Project/QtCreator/qctools-gui/qctools-gui.pro
index 493f7d5d7..7f4ec8219 100644
--- a/Project/QtCreator/qctools-gui/qctools-gui.pro
+++ b/Project/QtCreator/qctools-gui/qctools-gui.pro
@@ -7,7 +7,7 @@ greaterThan(QT_MAJOR_VERSION, 4): QT += widgets printsupport qml
 TARGET = QCTools
 TEMPLATE = app
 
-CONFIG += c++11 qt
+CONFIG += c++17 qt
 
 message("PWD = " $$PWD)
 
diff --git a/Project/QtCreator/qctools-lib/qctools-lib.pro b/Project/QtCreator/qctools-lib/qctools-lib.pro
index eb5af46fb..adb8e28b1 100644
--- a/Project/QtCreator/qctools-lib/qctools-lib.pro
+++ b/Project/QtCreator/qctools-lib/qctools-lib.pro
@@ -2,7 +2,7 @@ QT = core network multimedia concurrent
 
 TARGET = qctools
 TEMPLATE = lib
-CONFIG += c++11
+CONFIG += c++17
 CONFIG += staticlib
 
 message('qctools-lib: including ffmpeg')