diff --git a/tibuild/pkg/rest/service/artifact_helper.go b/tibuild/pkg/rest/service/artifact_helper.go
index 5040ca8..4621d04 100644
--- a/tibuild/pkg/rest/service/artifact_helper.go
+++ b/tibuild/pkg/rest/service/artifact_helper.go
@@ -45,7 +45,7 @@ var source_image_reg *regexp.Regexp
 var target_image_reg *regexp.Regexp
 
 func init() {
-	source_image_reg = regexp.MustCompile(`^hub.pingcap.net/qa/[\w-]+:v\d+\.\d+\.\d-\d{8,}.*$`)
+	source_image_reg = regexp.MustCompile(`^hub.pingcap.net/qa/[\w-]+:v\d+\.\d+\.\d+-\d{8,}.*$`)
 	target_image_reg = regexp.MustCompile(`^(docker.io/)?pingcap/[\w-]+:v\d+\.\d+\.\d+-\d{8,}.*$`)
 }