diff --git a/components/DataDirPicker.tsx b/components/DataDirPicker.tsx
index f457f57..04e7450 100644
--- a/components/DataDirPicker.tsx
+++ b/components/DataDirPicker.tsx
@@ -30,7 +30,7 @@ const DataDirPicker: React.FC<Props> = () => {
   const onDataDirButtonClick = async (event: {
     target: { files: FileList | null };
   }) => {
-    if (!workerPool) {
+    if (!workerPool || workerPool.availableWorkers.length === 0) {
       return alert("Workers not loaded yet");
     }
     const files = event.target.files ?? [];
diff --git a/components/DropZone.tsx b/components/DropZone.tsx
index 7195ea0..389fe19 100644
--- a/components/DropZone.tsx
+++ b/components/DropZone.tsx
@@ -58,7 +58,7 @@ export const DropZone: React.FC<Props> = ({ children, workerPool }) => {
       const pluginFiles = await Promise.all(
         plugins.map(async (plugin) => plugin.getFile())
       );
-      if (workerPool) {
+      if (workerPool && workerPool.availableWorkers.length > 0) {
         parsePluginFiles(pluginFiles, workerPool);
       } else {
         alert("Workers not loaded yet");
@@ -117,7 +117,7 @@ export const DropZone: React.FC<Props> = ({ children, workerPool }) => {
             )
         )
       );
-      if (workerPool) {
+      if (workerPool && workerPool.availableWorkers.length > 0) {
         parsePluginFiles(pluginFiles, workerPool);
       } else {
         alert("Workers not loaded yet");
diff --git a/lib/WorkerPool.ts b/lib/WorkerPool.ts
index 9dcfba1..5a1cccc 100644
--- a/lib/WorkerPool.ts
+++ b/lib/WorkerPool.ts
@@ -26,7 +26,7 @@ export class WorkerPool {
   public async init(count: number = window.navigator.hardwareConcurrency ?? 8): Promise<WorkerPool> {
     this.availableWorkers = [];
     for (let i = 0; i < count; i++) {
-      this.availableWorkers.push(await this.createWorker());
+      this.createWorker().then(worker => this.availableWorkers.push(worker));
     }
     return this;
   }