diff --git a/src/main/java/es/kauron/jstudy/controller/Controller.java b/src/main/java/es/kauron/jstudy/controller/Controller.java
index 0dd004d..4eb3edf 100644
--- a/src/main/java/es/kauron/jstudy/controller/Controller.java
+++ b/src/main/java/es/kauron/jstudy/controller/Controller.java
@@ -77,6 +77,8 @@ public class Controller implements Initializable {
             root.getScene().getWindow().setOnCloseRequest(event -> {
                 for (Tab tab : tabPane.getTabs()) {
                     EventHandler<Event> handler = tab.getOnCloseRequest();
+                    if (tabMap.containsKey(tab))
+                        tabMap.get(tab).stopTimer();
                     if (tab.isClosable() && handler != null) {
                         tabPane.getSelectionModel().select(tab);
                         handler.handle(event);
diff --git a/src/main/java/es/kauron/jstudy/controller/TableController.java b/src/main/java/es/kauron/jstudy/controller/TableController.java
index 693028b..ef7ea9c 100644
--- a/src/main/java/es/kauron/jstudy/controller/TableController.java
+++ b/src/main/java/es/kauron/jstudy/controller/TableController.java
@@ -209,4 +209,11 @@ public class TableController implements Initializable {
             timerTask = null;
         }
     }
+
+    void stopTimer() {
+        timer.cancel();
+        timer.purge();
+        if (timerTask != null)
+            timerTask.cancel();
+    }
 }