diff --git a/define/seagger_ui.go b/define/seagger_ui.go
index db5ef34..df64281 100644
--- a/define/seagger_ui.go
+++ b/define/seagger_ui.go
@@ -11,4 +11,5 @@ const (
 	SwaggerUIThemeDefault   = "swaggerUI"     // 文档默认主题
 	SwaggerUIThemeKnife4go  = "knife4go"      // knife4go 主题
 	SwaggerUIThemeYDocLucky = "ydoc-lucky-ui" // YDoc Lucky UI 主题: https://github.com/NoBugBoy/LuckyUI
+	SwaggerUIThemeRedocFree = "redoc-free"    // redoc UI 主题, 开源免费版: https://github.com/Redocly/redoc
 )
diff --git a/swagger_ui.go b/swagger_ui.go
index dc00fa7..7c97a81 100644
--- a/swagger_ui.go
+++ b/swagger_ui.go
@@ -106,6 +106,11 @@ func (su *SwaggerUI) Handler() func(ctx *gin.Context) {
 	case define.SwaggerUIThemeYDocLucky:
 		// YDoc-Lucky-UI 主题处理
 		return su.HandleLuckyUI()
+	case define.SwaggerUIThemeDefault:
+		return su.HandleSwaggerUI()
+	case define.SwaggerUIThemeRedocFree:
+		// redoc免费版, TODO : 待完成
+		return su.HandleSwaggerUI()
 	default:
 		return su.HandleSwaggerUI()
 	}