diff --git a/main.go b/main.go
index a3c3ffd..caefd12 100644
--- a/main.go
+++ b/main.go
@@ -38,6 +38,11 @@ var client = &http.Client{
 				req.Header[key] = val
 			}
 		}
+				// S3 重定向时添加必要的头
+		if strings.Contains(req.URL.Host, "amazonaws.com") {
+			req.Header.Set("x-amz-content-sha256", "UNSIGNED-PAYLOAD")
+		}
+		
 		return nil
 	},
 	Timeout: 30 * time.Second,