diff --git a/cotracker_node.py b/cotracker_node.py
index 2f95cb2..ca72b9f 100644
--- a/cotracker_node.py
+++ b/cotracker_node.py
@@ -406,6 +406,7 @@ class CoTrackerNode:
                 if frame_idx < images_np.shape[0]:
                     cv2.circle(images_np[frame_idx], (int(x), int(y)), marker_radius, marker_color, marker_thickness)
             
+            point_track = [point_track]
             point_results += [json.dumps(point_track)]
         
         return point_results, images_np