diff --git a/ChangeLog.txt b/ChangeLog.txt
index cbcd389..cb687db 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -2,6 +2,9 @@ CatRadio
 
 (+ New, * Updated, - Removed)
 
+1.4.1 - 2024-xx-xx
+	+ Check hamlib version on startup
+
 1.4.0 - 2024-03-17
 	+ Auto Connect option
 	+ Auto Power-on option
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 219b0b2..7df3d87 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -39,6 +39,7 @@
 #include <QApplication>
 #include <QCoreApplication>
 #include <QDir>
+#include <QMessageBox>
 
 #include <cwchar>
 #include <rig.h>    //Hamlib
@@ -193,7 +194,19 @@ MainWindow::MainWindow(QWidget *parent)
     ui->lineEdit_vfoMain->setValue(0);
     ui->lineEdit_vfoSub->setValue(0);
 
-    if (rigCom.autoConnect) ui->pushButton_Connect->toggle(); //Auto connect
+    //Check Hamlib version
+    if (!checkHamlibVersion(4, 6, 0))
+    {
+        QMessageBox msgBox;
+        msgBox.setWindowTitle("Hamlib");
+        msgBox.setText("Please, update Hamlib libraries to version 4.6 or higher.");
+        msgBox.setIcon(QMessageBox::Warning);
+        msgBox.setStandardButtons(QMessageBox::Ok);
+        msgBox.exec();
+    }
+
+    //Auto connect
+    if (rigCom.autoConnect) ui->pushButton_Connect->toggle();
 }
 
 MainWindow::~MainWindow()
@@ -802,6 +815,32 @@ void MainWindow::setSubMeter()
 }
 
 
+bool MainWindow::checkHamlibVersion(int major, int minor, int revision)
+{
+    QString hamlibVer = rig_version();
+    QRegularExpression hamlibVerExp("(?P<major>\\d)\\.(?P<minor>\\d)\\.?(?P<revision>\\d)?");
+
+    QRegularExpressionMatch hamlibVerMatch = hamlibVerExp.match(hamlibVer);
+
+    if (hamlibVerMatch.hasMatch())
+    {
+        int majorVer = hamlibVerMatch.captured("major").toInt();
+        int minorVer = hamlibVerMatch.captured("minor").toInt();
+        int revisionVer = hamlibVerMatch.captured("revision").toInt();
+
+        //qDebug()<<majorVer<<minorVer<<revisionVer;
+
+        if (majorVer > major) return true;
+        else if (majorVer < major) return false;
+        else if (minorVer > minor) return true;    //& majorVer=major
+        else if (minorVer < minor) return false;   //& majorVer=major
+        else if (revisionVer < revision) return false; //& majorVer=major, minorVer=minor
+        else return true;   //revisionVer>=revision & majorVer=major, minorVer=minor
+    }
+    else return false;
+}
+
+
 //***** PushButton *****
 
 void MainWindow::on_pushButton_Connect_toggled(bool checked)
diff --git a/mainwindow.h b/mainwindow.h
index 2111747..6a618b9 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -220,6 +220,8 @@ private:
 
     void guiInit();
     void setSubMeter();
+
+    bool checkHamlibVersion(int major, int minor, int revision);
 };
 
 #endif // MAINWINDOW_H