diff --git a/ExcelViewer/mainwindow.cpp b/ExcelViewer/mainwindow.cpp
index 79601bbd..c58f7f81 100644
--- a/ExcelViewer/mainwindow.cpp
+++ b/ExcelViewer/mainwindow.cpp
@@ -16,9 +16,6 @@
 
 using namespace QXlsx;
 
-// Hard-coded QXlsx version string (based on the library you are using)
-// static const char *QXLSX_VERSION = "1.5.0";
-
 MainWindow::MainWindow(QWidget *parent)
     : QMainWindow(parent)
 {
diff --git a/QXlsx/CMakeLists.txt b/QXlsx/CMakeLists.txt
index 653ce416..a1a9754f 100644
--- a/QXlsx/CMakeLists.txt
+++ b/QXlsx/CMakeLists.txt
@@ -3,7 +3,7 @@
 cmake_minimum_required(VERSION 3.16)
 
 project(QXlsx
-    VERSION 1.5.0
+    VERSION 1.5.1
     LANGUAGES CXX
 )
 
@@ -158,6 +158,14 @@ target_compile_definitions(QXlsx PRIVATE
     QT_DISABLE_DEPRECATED_BEFORE=0x060600
 )
 
+
+if(MSVC)
+    # SHELL: forces CMake to place /permissive at the very end of the argument list,
+    # overriding any automatically appended /permissive- flags.
+    target_compile_options(QXlsx PRIVATE "SHELL:/permissive")
+endif()
+
+
 if (NOT WIN32)
     # Strict iterators can't be used on Windows, they lead to a link error
     # when application code iterates over a QVector<QPoint> for instance, unless
diff --git a/QXlsx/QXlsx.pri b/QXlsx/QXlsx.pri
index 7459852b..03fd11f8 100644
--- a/QXlsx/QXlsx.pri
+++ b/QXlsx/QXlsx.pri
@@ -5,8 +5,17 @@
 QT += core
 QT += gui-private
 
-# TODO: Define your C++ version. c++14, c++17, etc.
-CONFIG += c++11
+# Define your C++ version.
+# Safe method using built-in variables without brackets
+lessThan(QT_MAJOR_VERSION, 6) {
+    # Set C++11 for Qt 5 (5.7 or higher version)
+    CONFIG += c++11
+    message("Qt 5 detected: Setting C++ standard to C++11")
+} else {
+    # Set C++17 for Qt 6
+    CONFIG += c++17
+    message("Qt 6 detected: Setting C++ standard to C++17")
+}
 
 # The following define makes your compiler emit warnings if you use
 # any feature of Qt which has been marked as deprecated (the exact warnings
diff --git a/QXlsx/QXlsx.pro b/QXlsx/QXlsx.pro
index 5cc35757..c4946b80 100644
--- a/QXlsx/QXlsx.pro
+++ b/QXlsx/QXlsx.pro
@@ -29,10 +29,4 @@ QXLSX_HEADERPATH=$$PWD/header/
 QXLSX_SOURCEPATH=$$PWD/source/
 include($$PWD/QXlsx.pri)
 
-HEADERS += \
-    header/xlsxreadsax.h
-
-SOURCES += \
-    source/xlsxreadsax.cpp
-
 
diff --git a/QXlsx/header/xlsxglobal.h b/QXlsx/header/xlsxglobal.h
index 91756173..fc56f3d9 100644
--- a/QXlsx/header/xlsxglobal.h
+++ b/QXlsx/header/xlsxglobal.h
@@ -3,6 +3,19 @@
 #ifndef XLSXGLOBAL_H
 #define XLSXGLOBAL_H
 
+#if defined(_MSC_VER)
+#  ifndef stdext
+#    define stdext ::std
+#  endif
+#  include <iterator>
+namespace std {
+    template<class _Iter>
+    inline _Iter make_checked_array_iterator(_Iter _Array, size_t _Size, size_t _Start = 0) {
+        return _Array + _Start;
+    }
+}
+#endif
+
 #include <cstdio>
 #include <iostream>
 #include <string>