diff --git a/src/wagtail_bynder/static/bynder/js/video-chooser-modal.js b/src/wagtail_bynder/static/bynder/js/video-chooser-modal.js
index b962096..867a97f 100644
--- a/src/wagtail_bynder/static/bynder/js/video-chooser-modal.js
+++ b/src/wagtail_bynder/static/bynder/js/video-chooser-modal.js
@@ -1,7 +1,7 @@
 const videoChooserModalOnloadHandlers = new window.BynderChooserModalOnloadHandlerFactory({
   assetType: "video",
-  chosenMultipleUrl: `${window.chooserUrls.videoChooser}chosen-multiple/`,
-  chosenSingleUrl: `${window.chooserUrls.videoChooser}chosen/`,
+  chosenMultipleUrl: `${window.videoChosenBaseUrl}chosen-multiple/`,
+  chosenSingleUrl: `${window.videoChosenBaseUrl}chosen/`,
 }).getOnLoadHandlers();
 
 class VideoChooserModal {
diff --git a/src/wagtail_bynder/static/wagtailadmin/js/chooser-modal-handler-factory.js b/src/wagtail_bynder/static/wagtailadmin/js/chooser-modal-handler-factory.js
index 78b5ced..a70bbb3 100644
--- a/src/wagtail_bynder/static/wagtailadmin/js/chooser-modal-handler-factory.js
+++ b/src/wagtail_bynder/static/wagtailadmin/js/chooser-modal-handler-factory.js
@@ -9,6 +9,7 @@ class BynderChooserModalOnloadHandlerFactory {
     this.assetType = opts?.assetType || null;
     this.chosenMultipleUrl = opts?.chosenMultipleUrl || "/";
     this.chosenSingleUrl = opts?.chosenSingleUrl || "/";
+    this.chosenUrlAppendSlash = window.chosenUrlappendSlash || true;
   }
 
   onLoadChooseStep(modal) {
@@ -49,6 +50,9 @@ class BynderChooserModalOnloadHandlerFactory {
         }
         else {
           url = chosenSingleUrl + assets[0].databaseId;
+          if (chosenUrlAppendSlash) {
+            url += "/";
+          }
         }
         modal.loadUrl(url, params);
         return false;
diff --git a/src/wagtail_bynder/static/wagtaildocs/js/document-chooser-modal.js b/src/wagtail_bynder/static/wagtaildocs/js/document-chooser-modal.js
index 520798f..746b86b 100644
--- a/src/wagtail_bynder/static/wagtaildocs/js/document-chooser-modal.js
+++ b/src/wagtail_bynder/static/wagtaildocs/js/document-chooser-modal.js
@@ -1,7 +1,7 @@
 const documentChooserModalOnloadHandlers = new window.BynderChooserModalOnloadHandlerFactory({
   assetType: "document",
-  chosenMultipleUrl: `${window.chooserUrls.documentChooser}chosen-multiple/`,
-  chosenSingleUrl: `${window.chooserUrls.documentChooser}chosen/`,
+  chosenMultipleUrl: `${window.documentChosenBaseUrl}chosen-multiple/`,
+  chosenSingleUrl: `${window.documentChosenBaseUrl}chosen/`,
 }).getOnLoadHandlers();
 
 class DocumentChooserModal {
diff --git a/src/wagtail_bynder/static/wagtailimages/js/image-chooser-modal.js b/src/wagtail_bynder/static/wagtailimages/js/image-chooser-modal.js
index 08d08b8..e6c08e5 100644
--- a/src/wagtail_bynder/static/wagtailimages/js/image-chooser-modal.js
+++ b/src/wagtail_bynder/static/wagtailimages/js/image-chooser-modal.js
@@ -1,7 +1,7 @@
 const imageChooserModalOnloadHandlers = new window.BynderChooserModalOnloadHandlerFactory({
   assetType: "image",
-  chosenMultipleUrl: `${window.chooserUrls.imageChooser}chosen-multiple/`,
-  chosenSingleUrl: `${window.chooserUrls.imageChooser}chosen/`,
+  chosenMultipleUrl: `${window.imageChosenBaseUrl}chosen-multiple/`,
+  chosenSingleUrl: `${window.imageChosenBaseUrl}chosen/`,
 }).getOnLoadHandlers();
 
 class ImageChooserModal {
diff --git a/src/wagtail_bynder/templates/wagtailadmin/admin_base.html b/src/wagtail_bynder/templates/wagtailadmin/admin_base.html
index a0035e9..4035c74 100644
--- a/src/wagtail_bynder/templates/wagtailadmin/admin_base.html
+++ b/src/wagtail_bynder/templates/wagtailadmin/admin_base.html
@@ -6,6 +6,10 @@
     <script>
         window.bynderAPIToken = '{% bynder_compactview_api_token %}';
         window.bynderDomain = '{% bynder_domain %}';
+        window.chosenUrlAppendSlash = {% get_append_slash %};
+        window.imageChosenBaseUrl = "{% get_image_chosen_base_url %}";
+        window.documentChosenBaseUrl = "{% get_document_chosen_base_url %}";
+        window.videoChosenBaseUrl = "{% get_video_chosen_base_url %}";
     </script>
     <script src="{% static 'wagtailadmin/js/chooser-modal-handler-factory.js' %}"></script>
 
diff --git a/src/wagtail_bynder/templatetags/bynder_tags.py b/src/wagtail_bynder/templatetags/bynder_tags.py
index c190ee3..93a37fe 100644
--- a/src/wagtail_bynder/templatetags/bynder_tags.py
+++ b/src/wagtail_bynder/templatetags/bynder_tags.py
@@ -1,5 +1,8 @@
 from django import template
 from django.conf import settings
+from django.urls import reverse
+
+from wagtail_bynder import get_video_model
 
 
 register = template.Library()
@@ -13,3 +16,35 @@ def bynder_domain():
 @register.simple_tag
 def bynder_compactview_api_token():
     return getattr(settings, "BYNDER_COMPACTVIEW_API_TOKEN", "")
+
+
+@register.simple_tag
+def get_image_chosen_base_url():
+    url = reverse("wagtailimages_chooser:choose")
+    if not url.endswith("/"):
+        url += "/"
+    return url
+
+
+@register.simple_tag
+def get_document_chosen_base_url():
+    url = reverse("wagtaildocs_chooser:choose")
+    if not url.endswith("/"):
+        url += "/"
+    return url
+
+
+@register.simple_tag
+def get_video_chosen_base_url():
+    model = get_video_model()
+    if model:
+        url = model.snippet_viewset.chooser_viewset.get_url_name("choose")
+        if not url.endswith("/"):
+            url += "/"
+        return url
+    return ""
+
+
+@register.simple_tag
+def get_append_slash():
+    return str(bool(settings.APPEND_SLASH)).lower()
diff --git a/src/wagtail_bynder/wagtail_hooks.py b/src/wagtail_bynder/wagtail_hooks.py
index 1a91988..df00d8c 100644
--- a/src/wagtail_bynder/wagtail_hooks.py
+++ b/src/wagtail_bynder/wagtail_hooks.py
@@ -1,6 +1,5 @@
 from django.conf import settings
 from django.templatetags.static import static
-from django.urls import reverse
 from django.utils.html import format_html
 from wagtail import hooks
 from wagtail.admin.menu import MenuItem
@@ -50,17 +49,11 @@ def hide_image_and_document_summary_items(request, summary_items):
 
 @hooks.register("insert_editor_js")
 def editor_js():
-    if model := get_video_model():
+    if get_video_model():
         return format_html(
             """
-            <script>
-                window.chooserUrls.videoChooser = '{0}';
-            </script>
-            <script src="{1}"></script>
+            <script src="{0}"></script>
             """,
-            reverse(
-                f"{model.snippet_viewset.get_chooser_admin_url_namespace()}:choose"
-            ),
             static("bynder/js/video-chooser-modal.js"),
         )
 
diff --git a/tox.ini b/tox.ini
index dba0f16..09e8f66 100644
--- a/tox.ini
+++ b/tox.ini
@@ -2,7 +2,7 @@
 min_version = 4.11
 
 envlist =
-    py{3.11,3.12}-django{4.2,5.0}-wagtail{5.2,6.0}
+    py{3.11,3.12}-django{4.2,5.0}-wagtail{5.2,6.1}
 
 [gh-actions]
 python =
@@ -35,7 +35,7 @@ deps =
     django5.0: Django>=5.0,<5.1
 
     wagtail5.2: wagtail>=5.2,<5.3
-    wagtail6.0: wagtail>=6.0,<6.1
+    wagtail6.1: wagtail>=6.1,<6.2
     wagtailmain: git+https://github.com/wagtail/wagtail.git
 
     postgres: psycopg2>=2.9