diff --git a/packages/common/src/upload/common/host/index.ts b/packages/common/src/upload/common/host/index.ts
index 827dd358..214f0108 100644
--- a/packages/common/src/upload/common/host/index.ts
+++ b/packages/common/src/upload/common/host/index.ts
@@ -47,7 +47,7 @@ export class Host {
    * @description 获取当前 host 的完整 url
    */
   getUrl() {
-    return `${this.protocol}://${this.host}`
+    return `${this.protocol.toLowerCase()}://${this.host}`
   }
 
   /**