diff --git a/labscore/cardstack/stack.js b/labscore/cardstack/stack.js
index f3f8367..ae70178 100644
--- a/labscore/cardstack/stack.js
+++ b/labscore/cardstack/stack.js
@@ -129,8 +129,8 @@ class DynamicCardStack {
         console.error("Component Handler Exception:")
         console.error(e)
       },
-      onTimeout: ()=> {
-        this.kill(true);
+      onTimeout: async (_e)=> {
+        await this.kill(true);
       }
     })