diff --git a/lib/tfw/components/terminado_event_handler.py b/lib/tfw/components/terminado_event_handler.py
index e6fa2cd..756d4db 100644
--- a/lib/tfw/components/terminado_event_handler.py
+++ b/lib/tfw/components/terminado_event_handler.py
@@ -34,3 +34,6 @@ class TerminadoEventHandler(TriggerlessEventHandler):
         data['count'] = int(data.get('count', 1))
         data['history'] = self.historymonitor.history[-data['count']:]
         return data
+
+    def cleanup(self):
+        self.historymonitor.stop()