diff --git a/server/src/plugin/runtime/cluster-fork-worker.ts b/server/src/plugin/runtime/cluster-fork-worker.ts
index 01142166c..c43a9757d 100644
--- a/server/src/plugin/runtime/cluster-fork-worker.ts
+++ b/server/src/plugin/runtime/cluster-fork-worker.ts
@@ -16,7 +16,9 @@ export function createClusterForkWorker(
 
     // these are specific to the cluster worker host
     // and will be set there.
+    // @ts-ignore these are optional at runtime
     delete runtimeWorkerOptions.zipFile;
+    // @ts-ignore these are optional at runtime
     delete runtimeWorkerOptions.unzippedPath;
 
     const waitKilled = new Deferred<void>();