diff --git a/src/index.js b/src/index.js
index 6d005afa..8670f6f2 100644
--- a/src/index.js
+++ b/src/index.js
@@ -801,6 +801,10 @@ export default class Gantt {
             if (!($bar_progress && $bar_progress.finaldx)) return;
             bar.progress_changed();
             bar.set_action_completed();
+
+            bar = null;
+            $bar_progress = null;
+            $bar = null;
         });
     }