diff --git a/openflexure_microscope/api/v1/blueprints/camera/capture.py b/openflexure_microscope/api/v1/blueprints/camera/capture.py
index 8e4b1d28..0ae6ed23 100644
--- a/openflexure_microscope/api/v1/blueprints/camera/capture.py
+++ b/openflexure_microscope/api/v1/blueprints/camera/capture.py
@@ -72,8 +72,8 @@ class ListAPI(MicroscopeView):
             "use_video_port": true,
             "bayer": true,
             "size": {
-                "x": 640,
-                "y": 480
+                "width": 640,
+                "height": 480
             }
           }