diff --git a/yolo/model/yolo.py b/yolo/model/yolo.py
index cc9ce20..8d463c1 100644
--- a/yolo/model/yolo.py
+++ b/yolo/model/yolo.py
@@ -127,29 +127,35 @@ def save_load_weights(self, weights: Union[Path, OrderedDict]):
         """
         if isinstance(weights, Path):
             weights = torch.load(weights, map_location=torch.device("cpu"), weights_only=False)
-        if "model_state_dict" in weights:
+        if "model_state_dict" in weights:  #.pt
             weights = weights["model_state_dict"]
+        elif "state_dict" in weights:  #.ckpt
+            weights = weights["state_dict"]
 
-        model_state_dict = self.model.state_dict()
+        model_state_dict = self.state_dict()
 
-        # TODO1: autoload old version weight
         # TODO2: weight transform if num_class difference
 
         error_dict = {"Mismatch": set(), "Not Found": set()}
         for model_key, model_weight in model_state_dict.items():
-            if model_key not in weights:
+            weights_key = model_key
+            if weights_key not in weights:  #.ckpt
+                weights_key = "model." + model_key
+            if weights_key not in weights:  #.pt old
+                weights_key = model_key.removeprefix("model.")
+            if weights_key not in weights:
                 error_dict["Not Found"].add(tuple(model_key.split(".")[:-2]))
                 continue
-            if model_weight.shape != weights[model_key].shape:
+            if model_weight.shape != weights[weights_key].shape:
                 error_dict["Mismatch"].add(tuple(model_key.split(".")[:-2]))
                 continue
-            model_state_dict[model_key] = weights[model_key]
+            model_state_dict[model_key] = weights[weights_key]
 
         for error_name, error_set in error_dict.items():
             for weight_name in error_set:
                 logger.warning(f":warning: Weight {error_name} for key: {'.'.join(weight_name)}")
 
-        self.model.load_state_dict(model_state_dict)
+        self.load_state_dict(model_state_dict)
 
 
 def create_model(model_cfg: ModelConfig, weight_path: Union[bool, Path] = True, class_num: int = 80) -> YOLO: