diff --git a/packages/core/parcel-bundler/src/Bundler.js b/packages/core/parcel-bundler/src/Bundler.js
index dd7d17312a8..d02c93eb857 100644
--- a/packages/core/parcel-bundler/src/Bundler.js
+++ b/packages/core/parcel-bundler/src/Bundler.js
@@ -329,7 +329,7 @@ class Bundler extends EventEmitter {
 
       // If not in watch mode, stop the worker farm so we don't keep the process running.
       if (!this.watcher && this.options.killWorkers) {
-        this.stop();
+        await this.stop();
       }
     }
   }