diff --git a/src/mysql.h b/src/mysql.h
index bd1ad85..197d327 100644
--- a/src/mysql.h
+++ b/src/mysql.h
@@ -190,7 +190,7 @@ namespace module
 		ylib::mysql::prepare_statement* m_pstt = nullptr;
 	};
 
-	class mysql_conn
+	class mysql_conn :public module::base 
 	{
 	public:
 		mysql_conn();
@@ -217,6 +217,10 @@ namespace module
 		void free();
 
 		static void regist(sol::state* lua);
+		// 通过 imodule 继承
+		virtual void regist_global(const char* name, sol::state* lua);
+		virtual void delete_global() { delete this; }
+		virtual void self_free();
 	private:
 		ylib::mysql::conn* m_conn = nullptr;
 	};
@@ -258,6 +262,7 @@ namespace module
 		// 通过 imodule 继承
 		virtual void regist_global(const char* name, sol::state* lua);
 		virtual void delete_global() { delete this; }
+		virtual void self_free() { }
 	};
 
 }