diff --git a/src/main/java/es/kauron/jstudy/controller/TableController.java b/src/main/java/es/kauron/jstudy/controller/TableController.java
index 6c0f532..b9cf2f4 100644
--- a/src/main/java/es/kauron/jstudy/controller/TableController.java
+++ b/src/main/java/es/kauron/jstudy/controller/TableController.java
@@ -78,6 +78,8 @@ public class TableController implements Initializable {
             if (AppConfig.lastDir != null) chooser.setInitialDirectory(AppConfig.lastDir);
             chooser.setInitialFileName(name);
             file = chooser.showSaveDialog(table.getScene().getWindow());
+            if (!file.getName().endsWith(".jsdb"))
+                file = new File(file.getPath() + ".jsdb");
             if (file != null)
                 AppConfig.lastDir = file.getParentFile();
         }