diff --git a/CMakeLists.txt b/CMakeLists.txt
index f1e67b9..852875f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -37,6 +37,7 @@ target_link_libraries(
     ${CMAKE_PROJECT_NAME}
     Qt5::Core
     Qt5::Gui
+    Qt5::Sql
     Qt5::Widgets
 )
 
diff --git a/deps/tables.ddl b/deps/tables.ddl
index c796cd8..e89bed5 100644
--- a/deps/tables.ddl
+++ b/deps/tables.ddl
@@ -10,6 +10,3 @@ CREATE TABLE IF NOT EXISTS clients (
     yourCompany TEXT NOT NULL,
     comment TEXT
 );
-
-COMMENT ON TABLE clients IS '';
-COMMENT ON FIELD clients.id IS '';
diff --git a/src/LicenseModel/LicenseModel.cpp b/src/LicenseModel/LicenseModel.cpp
index 4cd7a29..4ade85a 100644
--- a/src/LicenseModel/LicenseModel.cpp
+++ b/src/LicenseModel/LicenseModel.cpp
@@ -7,6 +7,8 @@
 #include <QDebug>
 
 // Self
+#include <qfile.h>
+
 #include "../def.h"
 
 const static int COLUMN_COUNT = 9;
@@ -14,13 +16,13 @@ const static int COLUMN_COUNT = 9;
 LicenseModel::LicenseModel(QObject* parent)
     : QAbstractTableModel(parent)
 {
-    QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
-    db.setDatabaseName(DB_PATH);
+    m_db = QSqlDatabase::addDatabase("QSQLITE");
+    m_db.setDatabaseName(DB_PATH);
 
-    if (!db.open())
+    if (!m_db.open())
     {
         m_status = Status::DbExistError;
-        m_errors.append("Database connection failed: " + db.lastError().text());
+        m_errors.append("Database connection failed: " + m_db.lastError().text());
     }
     else
     {
@@ -100,7 +102,7 @@ QVariant LicenseModel::headerData(int section, Qt::Orientation orientation, int
 
 LicenseModel::Status LicenseModel::getStatus()
 {
-    return Status::Ok;
+    return m_status;
 }
 
 QString LicenseModel::getStatusText()
@@ -119,3 +121,29 @@ bool LicenseModel::checkTables()
     if (!clienttableExist)
         return false;
 }
+
+bool LicenseModel::prepareDatabase()
+{
+    QFile tablesFile(QStringLiteral(":/deps/tables.ddl"));
+    if (!tablesFile.open(QIODevice::ReadOnly | QIODevice::Text))
+        return false;
+
+    m_status = Status::None;
+    m_errors.clear();
+
+    for (auto item : QString(tablesFile.readAll()).split(';'))
+    {
+        if (item.trimmed().isEmpty())
+            continue;
+        QSqlQuery query(item.trimmed() + ";", m_db);
+        if (!query.exec())
+        {
+            m_status = Status::DbStructError;
+            qDebug() << item.trimmed() + ";" << query.lastError().text();
+            m_errors.append(query.lastError().text());
+            return false;
+        }
+    }
+
+    return true;
+}
diff --git a/src/LicenseModel/LicenseModel.h b/src/LicenseModel/LicenseModel.h
index 3d5a3de..11df3b1 100644
--- a/src/LicenseModel/LicenseModel.h
+++ b/src/LicenseModel/LicenseModel.h
@@ -42,6 +42,8 @@ public:
     Status getStatus();
     QString getStatusText();
 
+    bool prepareDatabase();
+
 private:
     bool checkTables();
 
diff --git a/src/MainWidget/MainWidget.cpp b/src/MainWidget/MainWidget.cpp
index da09aae..a719731 100644
--- a/src/MainWidget/MainWidget.cpp
+++ b/src/MainWidget/MainWidget.cpp
@@ -1,12 +1,15 @@
 #include "MainWidget.h"
 
 // Qt
+#include <QApplication>
+#include <QDebug>
 #include <QHeaderView>
 #include <QLabel>
 #include <QMenu>
 #include <QMessageBox>
 #include <QPushButton>
 #include <QTableView>
+#include <QTimer>
 #include <QToolBar>
 #include <QVBoxLayout>
 #include <QContextMenuEvent>
@@ -22,6 +25,25 @@ MainWidget::MainWidget(QWidget *parent)
     setWindowTitle("LicenseManager");
     resize({800, 600});
 
+    // Model init
+    {
+        if (m_licenseModel->getStatus() == LicenseModel::Status::DbStructError)
+        {
+            if (!m_licenseModel->prepareDatabase())
+            {
+                QTimer::singleShot(0, [&]() {
+                    QMessageBox messageBox;
+                    messageBox.setIcon(QMessageBox::Critical);
+                    messageBox.setWindowTitle(tr("Error"));
+                    messageBox.setText(tr("Error with prepare database"));
+                    messageBox.setDetailedText(m_licenseModel->getStatusText());
+                    messageBox.exec();
+                    QApplication::quit();
+                });
+            }
+        }
+    }
+
     // Ui
     {
         m_tableView = new QTableView(this);