diff --git a/diffsynth/pipelines/wan_video_new.py b/diffsynth/pipelines/wan_video_new.py
index 44a64c9..9086af2 100644
--- a/diffsynth/pipelines/wan_video_new.py
+++ b/diffsynth/pipelines/wan_video_new.py
@@ -143,10 +143,8 @@ class BasePipeline(torch.nn.Module):
         self.vram_management_enabled = True
         
         
-    def get_free_vram(self):
-        total_memory = torch.cuda.get_device_properties(self.device).total_memory
-        allocated_memory = torch.cuda.device_memory_used(self.device)
-        return (total_memory - allocated_memory) / (1024 ** 3)
+    def get_vram(self):
+        return torch.cuda.mem_get_info(self.device)[1] / (1024 ** 3)
     
     
     def freeze_except(self, model_names):
@@ -247,7 +245,7 @@ class WanVideoPipeline(BasePipeline):
             vram_limit = None
         else:
             if vram_limit is None:
-                vram_limit = self.get_free_vram()
+                vram_limit = self.get_vram()
             vram_limit = vram_limit - vram_buffer
         if self.text_encoder is not None:
             dtype = next(iter(self.text_encoder.parameters())).dtype
diff --git a/diffsynth/vram_management/layers.py b/diffsynth/vram_management/layers.py
index dd4a245..c0beaf8 100644
--- a/diffsynth/vram_management/layers.py
+++ b/diffsynth/vram_management/layers.py
@@ -13,7 +13,8 @@ class AutoTorchModule(torch.nn.Module):
         super().__init__()
         
     def check_free_vram(self):
-        used_memory = torch.cuda.device_memory_used(self.computation_device) / (1024 ** 3)
+        gpu_mem_state = torch.cuda.mem_get_info(self.computation_device)
+        used_memory = (gpu_mem_state[1] - gpu_mem_state[0]) / (1024 ** 3)
         return used_memory < self.vram_limit
 
     def offload(self):
diff --git a/requirements.txt b/requirements.txt
index c25b688..92d8b48 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-torch>=2.6.0
+torch>=2.0.0
 torchvision
 cupy-cuda12x
 transformers