diff --git a/app/templates/index.html b/app/templates/index.html
index c220e88..de9e4e9 100644
--- a/app/templates/index.html
+++ b/app/templates/index.html
@@ -12,7 +12,7 @@
       </a>
 
       <div style="display:flex; justify-content:flex-end; margin-top:12px;">
-        <select onchange="const u=new URL(location); u.searchParams.set('facet_sort', this.value); location.href=u;"
+        <select onchange="const u=new window.URL(location); u.searchParams.set('facet_sort', this.value); location.href=u;"
                 title="Sortierung der Kategorie-/Hersteller-Listen" style="font-size:.75rem; padding:3px 6px;">
           {% for value, label in facet_sort_options.items() %}
           <option value="{{ value }}" {% if facet_sort == value %}selected{% endif %}>{{ label }}</option>
diff --git a/app/templates/prompts.html b/app/templates/prompts.html
index d668bcf..0093c47 100644
--- a/app/templates/prompts.html
+++ b/app/templates/prompts.html
@@ -12,7 +12,7 @@
       </a>
 
       <div style="display:flex; justify-content:flex-end; margin-top:12px;">
-        <select onchange="const u=new URL(location); u.searchParams.set('facet_sort', this.value); location.href=u;"
+        <select onchange="const u=new window.URL(location); u.searchParams.set('facet_sort', this.value); location.href=u;"
                 title="Sortierung der Kategorie-Liste" style="font-size:.75rem; padding:3px 6px;">
           {% for value, label in facet_sort_options.items() %}
           <option value="{{ value }}" {% if facet_sort == value %}selected{% endif %}>{{ label }}</option>