diff --git a/models/Questionnaire.js b/models/Questionnaire.js
index e638716..3a1a6f8 100644
--- a/models/Questionnaire.js
+++ b/models/Questionnaire.js
@@ -54,7 +54,7 @@ module.exports = (sequelize, DataTypes) =>
         introduction:
         {
             type: DataTypes.TEXT, allowNull: false,
-            set(value) { this.setDataValue("introduction", tool.trimIfNotNull(striptags(value,"<p><b><i><em><strong><ul><li><div><a><br>"))); },
+            set(value) { this.setDataValue("introduction", tool.trimIfNotNull(striptags(value,"<h3><h4><h5><p><b><i><em><strong><ul><li><div><a><br>"))); },
             validate:
             {
                 notNull: { msg: txt.needIntroduction }