diff --git a/sources/mainwindow.ui b/sources/mainwindow.ui
index e44f1a5..f8045b0 100644
--- a/sources/mainwindow.ui
+++ b/sources/mainwindow.ui
@@ -52,7 +52,11 @@
       </widget>
      </item>
      <item>
-      <widget class="QSpinBox" name="spinMod"/>
+      <widget class="QSpinBox" name="spinMod">
+       <property name="minimum">
+        <number>1</number>
+       </property>
+      </widget>
      </item>
     </layout>
    </widget>
diff --git a/sources/sqmtablemodel.cpp b/sources/sqmtablemodel.cpp
index 30c9c1c..aaa0a67 100644
--- a/sources/sqmtablemodel.cpp
+++ b/sources/sqmtablemodel.cpp
@@ -8,7 +8,7 @@ SQMTableModel::SQMTableModel(QObject *parent)
 
 
 int SQMTableModel::rowCount(const QModelIndex & /*parent*/) const {
-    return 2;
+    return binLen;
 }
 
 int SQMTableModel::columnCount(const QModelIndex & /*parent*/) const {
@@ -103,10 +103,14 @@ void SQMTableModel::CalculateSqmMatrix() {
 
     // Init BIN Column
     vector<int> colBin;
-    for (int i = 0; i <= binLen; i++) {
+    for (int i = 0; i < binLen; i++) {
         colBin.push_back(bin[i] - '0');
     }
+
+    // Add or remove rows
+    beginResetModel();
     sqmMatrix.push_back(colBin);
+    endResetModel();
 
     // Init SQN & MUL Column
     vector<int> colSqn, colMul;
@@ -117,7 +121,7 @@ void SQMTableModel::CalculateSqmMatrix() {
 
 
     // Calculate SQM
-    for (int i = 0; i <= binLen; i++) {
+    for (int i = 1; i < binLen; i++) {
         sqmMatrix.at(1).push_back((sqmMatrix.at(2).at(i - 1) * sqmMatrix.at(2).at(i - 1)) % mod);
 
         if (sqmMatrix.at(0).at(i) == 0) {
diff --git a/sources/sqmtablemodel.h b/sources/sqmtablemodel.h
index 55488a2..7a9dc83 100644
--- a/sources/sqmtablemodel.h
+++ b/sources/sqmtablemodel.h
@@ -26,7 +26,7 @@ private:
     int base;
     int exp;
     int mod;
-    int binLen;
+    int binLen = 0;
 
     vector<vector <int>> sqmMatrix;
 };