diff --git a/openflexure_microscope/api/app.py b/openflexure_microscope/api/app.py
index 71c6bc94..ef97d475 100644
--- a/openflexure_microscope/api/app.py
+++ b/openflexure_microscope/api/app.py
@@ -105,10 +105,10 @@ for extension in find_extensions(OPENFLEXURE_EXTENSIONS_PATH):
 labthing.add_view(views.CaptureList, "/captures")
 labthing.add_root_link(views.CaptureList, "captures")
 
-labthing.add_view(views.CaptureView, "/captures/<id>")
-labthing.add_view(views.CaptureDownload, "/captures/<id>/download/<filename>")
-labthing.add_view(views.CaptureTags, "/captures/<id>/tags")
-labthing.add_view(views.CaptureAnnotations, "/captures/<id>/annotations")
+labthing.add_view(views.CaptureView, "/captures/<id_>")
+labthing.add_view(views.CaptureDownload, "/captures/<id_>/download/<filename>")
+labthing.add_view(views.CaptureTags, "/captures/<id_>/tags")
+labthing.add_view(views.CaptureAnnotations, "/captures/<id_>/annotations")
 
 # Attach settings and state resources
 labthing.add_view(views.SettingsProperty, "/instrument/settings")
diff --git a/openflexure_microscope/api/v2/views/captures.py b/openflexure_microscope/api/v2/views/captures.py
index 5728b49a..b906777a 100644
--- a/openflexure_microscope/api/v2/views/captures.py
+++ b/openflexure_microscope/api/v2/views/captures.py
@@ -49,18 +49,18 @@ class CaptureSchema(Schema):
     def generate_links(self, data, **_):
         data.links = {
             "self": {
-                "href": url_for(CaptureView.endpoint, id=data.id, _external=True),
+                "href": url_for(CaptureView.endpoint, id_=data.id, _external=True),
                 "mimetype": "application/json",
                 **description_from_view(CaptureView),
             },
             "tags": {
-                "href": url_for(CaptureTags.endpoint, id=data.id, _external=True),
+                "href": url_for(CaptureTags.endpoint, id_=data.id, _external=True),
                 "mimetype": "application/json",
                 **description_from_view(CaptureTags),
             },
             "annotations": {
                 "href": url_for(
-                    CaptureAnnotations.endpoint, id=data.id, _external=True
+                    CaptureAnnotations.endpoint, id_=data.id, _external=True
                 ),
                 "mimetype": "application/json",
                 **description_from_view(CaptureAnnotations),
@@ -68,7 +68,7 @@ class CaptureSchema(Schema):
             "download": {
                 "href": url_for(
                     CaptureDownload.endpoint,
-                    id=data.id,
+                    id_=data.id,
                     filename=data.name,
                     _external=True,
                 ),