diff --git a/constraints.txt b/constraints.txt
index 2f1fae1..fb45dd0 100644
--- a/constraints.txt
+++ b/constraints.txt
@@ -2,3 +2,6 @@ Django>=3.1
 # Django-autocomplete-light does not play nicely with Django 4.0, so limit that for now.
 Django<4
 django-sendmail-backend==0.1.2
+
+# Old django-autocomplete-light does not support Safari and maybe Android built-in browser…
+django-autocomplete-light>=3.9.0rc1