diff --git a/src/QtOpenGL.h.cmake b/src/QtOpenGL.h.cmake
index 6a345fdd3d..a871f0bb50 100644
--- a/src/QtOpenGL.h.cmake
+++ b/src/QtOpenGL.h.cmake
@@ -33,10 +33,10 @@
 #include <QOpenGLVersionProfile>
 #include <QOpenGLFunctions>
 
-typedef QOpenGLContext QtGLContext;
-typedef QSurfaceFormat QtGLFormat;
-typedef QOpenGLWidget QtGLWidget;
-typedef QOpenGLFramebufferObject QtGLFramebufferObject;
-typedef QOpenGLFramebufferObjectFormat QtGLFramebufferObjectFormat;
+using QtGLContext = QOpenGLContext;
+using QtGLFormat = QSurfaceFormat;
+using QtGLWidget = QOpenGLWidget;
+using QtGLFramebufferObject = QOpenGLFramebufferObject;
+using QtGLFramebufferObjectFormat = QOpenGLFramebufferObjectFormat;
 
 #endif //QUARTER_QTOPENGL_H
diff --git a/src/Tools/ImageTools/ImageConv/CmdLine.h b/src/Tools/ImageTools/ImageConv/CmdLine.h
index 96bf91fd4e..88a965a70b 100644
--- a/src/Tools/ImageTools/ImageConv/CmdLine.h
+++ b/src/Tools/ImageTools/ImageConv/CmdLine.h
@@ -136,7 +136,7 @@ struct CCmdParam
 };
 
 // this class is actually a map of strings to vectors
-typedef map<StringType, CCmdParam> _CCmdLine;
+using _CCmdLine = map<StringType, CCmdParam>;
 
 // the command line parser class
 class CCmdLine : public _CCmdLine
diff --git a/src/Tools/plugins/widget/customwidgets.h b/src/Tools/plugins/widget/customwidgets.h
index ac31837653..19fdb365d4 100644
--- a/src/Tools/plugins/widget/customwidgets.h
+++ b/src/Tools/plugins/widget/customwidgets.h
@@ -68,7 +68,7 @@ namespace Base {
             Scientific = 2
         };
 
-        typedef int NumberOptions;
+        using NumberOptions = int;
         NumberOptions option;
         NumberFormat format;
         int precision;