diff --git a/.github/workflows/cmake-multi-platform.yml b/.github/workflows/cmake-multi-platform.yml
index e7e690b..47ad5f9 100644
--- a/.github/workflows/cmake-multi-platform.yml
+++ b/.github/workflows/cmake-multi-platform.yml
@@ -48,8 +48,6 @@ jobs:
       uses: jurplel/install-qt-action@v4.0.0
       with:
         cache: 'true'
-        version: '6.7.*'
-        aqtversion: '==3.1.19'
 
     - uses: actions/checkout@v4
 
diff --git a/include/QExtendedWidget.h b/include/QExtendedWidget.h
index 026af65..3ee1381 100644
--- a/include/QExtendedWidget.h
+++ b/include/QExtendedWidget.h
@@ -258,7 +258,7 @@ private slots:
         QObject* obj = sender();
         emit tableCellChanged(obj->property("row").toInt(), obj->property("column").toInt());
     }
-    void nullableEdited(Qt::CheckState checkState)
+    void nullableEdited(int checkState)
     {
         QObject* obj = sender();
         emit nullableChanged(obj->property("row").toInt(), checkState == Qt::Unchecked);
@@ -291,7 +291,7 @@ private slots:
             QCheckBox* nullableCheckBox = new QCheckBox();
             this->setCellWidget(row, 0, nullableCheckBox);
             nullableCheckBox->setProperty("row", row);
-            QObject::connect(nullableCheckBox, &QCheckBox::checkStateChanged, this, &QExtendedTableWidget::nullableEdited);
+            QObject::connect(nullableCheckBox, &QCheckBox::stateChanged, this, &QExtendedTableWidget::nullableEdited);
             nullableCheckBoxes.push_back(nullableCheckBox);
             // TODO: set column width of nullableCheckbox