diff --git a/docs/en/Tutorial_en.md b/docs/en/Tutorial_en.md
index 1eaabde7..430d5f2f 100644
--- a/docs/en/Tutorial_en.md
+++ b/docs/en/Tutorial_en.md
@@ -280,6 +280,7 @@ if err != nil {
 
 ```go
 bundle := pkg.NewGITResourceBundle("https://github.com/hyperjumptech/grule-rule-engine.git", "/**/*.grl")
+bundle.RefName = "refs/heads/main" // Specify your branch, defaults to master branch
 resources := bundle.MustLoad()
 for _, res := range resources {
     err := ruleBuilder.BuildRuleFromResource("TutorialRules", "0.0.1", res)