diff --git a/ChatTTS/model/gpt.py b/ChatTTS/model/gpt.py
index 94ea29c79..4109adf59 100644
--- a/ChatTTS/model/gpt.py
+++ b/ChatTTS/model/gpt.py
@@ -183,15 +183,15 @@ class _GenerationInputs:
         attention_mask: Optional[torch.Tensor] = None
         inputs_embeds: Optional[torch.Tensor] = None
 
-        def to(self, device: torch.device):
+        def to(self, device: torch.device, dtype: torch.dtype):
             if self.attention_mask is not None:
-                self.attention_mask = self.attention_mask.to(device)
+                self.attention_mask = self.attention_mask.to(device, dtype=dtype)
             if self.position_ids is not None:
-                self.position_ids = self.position_ids.to(device)
+                self.position_ids = self.position_ids.to(device, dtype=dtype)
             if self.inputs_embeds is not None:
-                self.inputs_embeds = self.inputs_embeds.to(device)
+                self.inputs_embeds = self.inputs_embeds.to(device, dtype=dtype)
             if self.cache_position is not None:
-                self.cache_position = self.cache_position.to(device)
+                self.cache_position = self.cache_position.to(device, dtype=dtype)
 
     def _prepare_generation_inputs(
         self,
@@ -422,7 +422,7 @@ def generate(
                     del inputs_ids_emb, model_input.input_ids
                 model_input.inputs_embeds = emb
 
-                model_input.to(self.device_gpt)
+                model_input.to(self.device_gpt, self.gpt.dtype)
 
                 outputs: BaseModelOutputWithPast = self.gpt(
                     attention_mask=model_input.attention_mask,