diff --git a/lib/downloadTask.js b/lib/downloadTask.js
index 4836841..5f871c0 100644
--- a/lib/downloadTask.js
+++ b/lib/downloadTask.js
@@ -21,7 +21,9 @@ export default class DownloadTask {
     this.bytesWritten = taskInfo.bytesWritten ?? 0
     this.totalBytes = taskInfo.totalBytes ?? 0
 
-    this.metadata = this.tryParseJson(taskInfo.metadata)
+    const metadata = this.tryParseJson(taskInfo.metadata)
+    if (metadata)
+      this.metadata = metadata
 
     if (originalTask) {
       this.beginHandler = originalTask.beginHandler