diff --git a/sources/SQM-GUI-ng.pro.user b/sources/SQM-GUI-ng.pro.user
index 96473c8..a322928 100644
--- a/sources/SQM-GUI-ng.pro.user
+++ b/sources/SQM-GUI-ng.pro.user
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE QtCreatorProject>
-<!-- Written by QtCreator 4.15.0, 2021-05-24T12:12:52. -->
+<!-- Written by QtCreator 4.15.0, 2021-05-24T23:36:50. -->
 <qtcreator>
  <data>
   <variable>EnvironmentId</variable>
diff --git a/sources/sqmtablemodel.cpp b/sources/sqmtablemodel.cpp
index 6a0ca9e..25a7287 100644
--- a/sources/sqmtablemodel.cpp
+++ b/sources/sqmtablemodel.cpp
@@ -27,6 +27,30 @@ QVariant SQMTableModel::data(const QModelIndex &index, int role) const {
 }
 
 
+bool SQMTableModel::setData(const QModelIndex &index, const QVariant &value, int role) {
+    if (role == Qt::EditRole) {
+        if (!checkIndex(index)) {
+            return false;
+        }
+        int row = index.row();
+        int col = index.column();
+
+
+        // call calculateSqmMatrix
+        sqmMatrix.at(col).at(row) = value.toInt();
+        CalculateSqmMatrix(row);
+        return true;
+    }
+    return false;
+}
+
+
+Qt::ItemFlags SQMTableModel::flags(const QModelIndex &index) const {
+    return Qt::ItemIsEditable | QAbstractTableModel::flags(index);
+}
+
+
+
 void SQMTableModel::SetStartValues(int pBase, int pExp, int pMod) {
     base = pBase;
     exp = pExp;
diff --git a/sources/sqmtablemodel.h b/sources/sqmtablemodel.h
index 65354c2..dd4a914 100644
--- a/sources/sqmtablemodel.h
+++ b/sources/sqmtablemodel.h
@@ -12,6 +12,8 @@ public:
     int rowCount(const QModelIndex &parent = QModelIndex()) const override;
     int columnCount(const QModelIndex &parent = QModelIndex()) const override;
     QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+    bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole) override;
+    Qt::ItemFlags flags(const QModelIndex &index) const override;
 
     void SetStartValues(int pBase, int pExp, int pMod);