diff --git a/u_conn.go b/u_conn.go
index caff710..4a3d7ce 100644
--- a/u_conn.go
+++ b/u_conn.go
@@ -631,7 +631,7 @@ func (uconn *UConn) SetTLSVers(minTLSVers, maxTLSVers uint16, specExtensions []T
 		}
 	}
 
-	if minTLSVers < VersionTLS10 || minTLSVers > VersionTLS12 {
+	if minTLSVers < VersionTLS10 || minTLSVers > VersionTLS13 {
 		return fmt.Errorf("uTLS does not support 0x%X as min version", minTLSVers)
 	}