diff --git a/annolid/gui/app.py b/annolid/gui/app.py
index 78a9c35..7475e94 100644
--- a/annolid/gui/app.py
+++ b/annolid/gui/app.py
@@ -1093,7 +1093,7 @@ def predict_from_next_frame(self,
                         task_function=process_video,
                         video_path=self.video_file,
                         frame_idx=self.frame_number,
-                        model_config='sam2_hiera_l.yaml' if 'hiera_l' in model_name else "sam2_hiera_s.yaml",
+                        model_config='sam2.1_hiera_l.yaml' if 'hiera_l' in model_name else "sam2.1_hiera_s.yaml",
                     )
                 else:
                     self.pred_worker = FlexibleWorker(
diff --git a/annolid/segmentation/SAM/sam_v2.py b/annolid/segmentation/SAM/sam_v2.py
index 6e6f774..2dbdcbc 100644
--- a/annolid/segmentation/SAM/sam_v2.py
+++ b/annolid/segmentation/SAM/sam_v2.py
@@ -17,7 +17,7 @@
 class SAM2VideoProcessor:
     def __init__(self, video_dir, id_to_labels,
                  checkpoint_path=None,
-                 model_config="sam2_hiera_s.yaml",
+                 model_config="sam2.1_hiera_s.yaml",
                  epsilon_for_polygon=2.0):
         """
         Initializes the SAM2VideoProcessor with the given parameters.
@@ -32,14 +32,14 @@ def __init__(self, video_dir, id_to_labels,
         # Set default checkpoint path if not provided
         if checkpoint_path is None:
             current_dir = os.path.dirname(os.path.abspath(__file__))
-            checkpoint = "sam2_hiera_small.pt" if 'hiera_s' in model_config else "sam2_hiera_large.pt"
+            checkpoint = "sam2.1_hiera_small.pt" if 'hiera_s' in model_config else "sam2.1_hiera_large.pt"
             checkpoint_path = os.path.join(current_dir,
                                            "segment-anything-2",
                                            "checkpoints",
                                            checkpoint
                                            )
 
-        self.BASE_URL = "https://dl.fbaipublicfiles.com/segment_anything_2/072824/"
+        self.BASE_URL = "https://dl.fbaipublicfiles.com/segment_anything_2/092824/"
 
         self.video_dir = video_dir
         self.checkpoint_path = checkpoint_path
@@ -66,6 +66,7 @@ def _initialize_predictor(self):
             sam2_checkpoint_url = f"{self.BASE_URL}{os.path.basename(self.checkpoint_path)}"
             download_file(sam2_checkpoint_url, self.checkpoint_path)
 
+        print(self.model_config, self.checkpoint_path)
         return build_sam2_video_predictor(self.model_config,
                                           self.checkpoint_path,
                                           device=self.device)
@@ -251,7 +252,7 @@ def run(self, annotations, frame_idx):
 def process_video(video_path,
                   frame_idx=0,
                   checkpoint_path=None,
-                  model_config="sam2_hiera_s.yaml",
+                  model_config="sam2.1_hiera_s.yaml",
                   epsilon_for_polygon=2.0):
     """
     Processes a video by extracting frames, loading annotations from multiple JSON files, and running analysis.
diff --git a/annolid/segmentation/SAM/segment-anything-2 b/annolid/segmentation/SAM/segment-anything-2
index 149486f..bc73938 160000
--- a/annolid/segmentation/SAM/segment-anything-2
+++ b/annolid/segmentation/SAM/segment-anything-2
@@ -1 +1 @@
-Subproject commit 149486f51fc92dad199e17f2729929689a5b8375
+Subproject commit bc739385ef058f9aa45cf5724257e2ab70a3bd19