diff --git a/app/mix/service/logic/share.go b/app/mix/service/logic/share.go
index 3b374262..1b3ea9c9 100644
--- a/app/mix/service/logic/share.go
+++ b/app/mix/service/logic/share.go
@@ -32,7 +32,7 @@ func (p *Share) GetZoneShareUrl(ctx *gin.Context) (string, error) {
 	if len(list) == 1 {
 		return list[0].Url, nil
 	}
-	doc := list[rand.Intn(len(list))-1]
+	doc := list[rand.Intn(len(list))]
 	retUrl := doc.Url
 	err1 := p.store.IncShareUrlUseCnt(ctx, retUrl)
 	if err1 != nil {