diff --git a/visits/admin.py b/visits/admin.py
index 9f8bfd175fd296e5540d4472964b4ea9590e2208..c505a5c5545228b538d9cf05d82ad16b2dffe025 100644
--- a/visits/admin.py
+++ b/visits/admin.py
@@ -4,6 +4,7 @@ from django import forms
 from django.contrib import admin, messages
 from django.template.defaultfilters import pluralize
 from django.urls import reverse
+from django.utils.safestring import mark_safe
 
 from .models import Participation, Place, Visit