diff --git a/par-core/src/main/java/com/par/core/storage/QiniuStorageService.java b/par-core/src/main/java/com/par/core/storage/QiniuStorageService.java
index 1ec36c3..1417443 100644
--- a/par-core/src/main/java/com/par/core/storage/QiniuStorageService.java
+++ b/par-core/src/main/java/com/par/core/storage/QiniuStorageService.java
@@ -32,8 +32,9 @@ public class QiniuStorageService implements StorageService {
         String sk = env("QINIU_SK");
         String regionStr = env("QINIU_REGION", "z2");
         this.bucket = env("QINIU_BUCKET", "par-configs");
-        this.downloadDomain = env("QINIU_DOWNLOAD_DOMAIN");
         this.auth = Auth.create(ak, sk);
+        this.downloadDomain = env("QINIU_DOWNLOAD_DOMAIN",
+                "http://" + bucket + ".qiniudn.com");
         Region region = switch (regionStr) {
             case "z0" -> Region.region0();
             case "z1" -> Region.region1();