diff --git a/assets b/assets
index f342a2a..8ec4514 160000
--- a/assets
+++ b/assets
@@ -1 +1 @@
-Subproject commit f342a2a7774c5163f8d5a6760b556b69d6fe498f
+Subproject commit 8ec4514b7690eef20b283c1f00ee2d921f19ae7d
diff --git a/models/policy.go b/models/policy.go
index f8255df..61fd171 100644
--- a/models/policy.go
+++ b/models/policy.go
@@ -52,7 +52,7 @@ type PolicyOption struct {
 	OdRedirect string `json:"od_redirect,omitempty"`
 
 	// Region 区域代码
-	Region string `json:"region"`
+	Region string `json:"region,omitempty"`
 }
 
 var thumbSuffix = map[string][]string{
diff --git a/pkg/filesystem/driver/s3/handler.go b/pkg/filesystem/driver/s3/handler.go
index 9ebf951..4cf44e2 100644
--- a/pkg/filesystem/driver/s3/handler.go
+++ b/pkg/filesystem/driver/s3/handler.go
@@ -87,10 +87,9 @@ func (handler Driver) List(ctx context.Context, base string, recursive bool) ([]
 	}
 
 	opt := &s3.ListObjectsInput{
-		Bucket:       &handler.Policy.BucketName,
-		Prefix:       &base,
-		EncodingType: aws.String(""),
-		MaxKeys:      aws.Int64(1000),
+		Bucket:  &handler.Policy.BucketName,
+		Prefix:  &base,
+		MaxKeys: aws.Int64(1000),
 	}
 
 	// 是否为递归列出