diff --git a/flask_modals/modal.py b/flask_modals/modal.py
index 41790cb..7feac71 100644
--- a/flask_modals/modal.py
+++ b/flask_modals/modal.py
@@ -110,6 +110,6 @@ def load(self):
         nprogress_html = render_template('modals/nprogress.html')
         main_html = render_template('modals/jstemplate.html')
 
-        html = Markup(nprogress_html + main_html)
+        html = markupsafe.Markup(nprogress_html + main_html)
 
         return html