diff --git a/static/js/components/app-main/index.js b/static/js/components/app-main/index.js
index d13ceb3..164aa61 100644
--- a/static/js/components/app-main/index.js
+++ b/static/js/components/app-main/index.js
@@ -93,6 +93,7 @@ function closeXTerm(name){
 
   if (runtime) {
     runtime.worker.port.postMessage({ action: 'close', name: name });
+    runtime.worker.port.close();
 
     delete AppRuntime[name];
   }