diff --git a/huobi/common/sign.go b/huobi/common/sign.go
index aa47d431..caff6577 100644
--- a/huobi/common/sign.go
+++ b/huobi/common/sign.go
@@ -14,7 +14,7 @@ func DoSignParam(httpMethod, reqUrl string, apiOpt options.ApiOptions) *url.Valu
 	signParams.Set("AccessKeyId", apiOpt.Key)
 	signParams.Set("SignatureMethod", "HmacSHA256")
 	signParams.Set("SignatureVersion", "2")
-	signParams.Set("Timestamp", time.Now().UTC().Format("2006-01-02T15:04:05"))
+	signParams.Set("Timestamp", time.Now().UTC().Format(time.DateTime))
 
 	reqURL, _ := url.Parse(reqUrl)
 	path := reqURL.RequestURI()