diff --git a/ktransformers/ktransformers_ext/cuda/binding.cpp b/ktransformers/ktransformers_ext/cuda/binding.cpp
index 0b1994d..5bba873 100644
--- a/ktransformers/ktransformers_ext/cuda/binding.cpp
+++ b/ktransformers/ktransformers_ext/cuda/binding.cpp
@@ -1,9 +1,9 @@
 /**
- * @Description  :  
+ * @Description  :
  * @Author       : Azure-Tang, Boxin Zhang
  * @Date         : 2024-07-25 13:38:30
  * @Version      : 0.2.2
- * @Copyright (c) 2024 by KVCache.AI, All Rights Reserved. 
+ * @Copyright (c) 2024 by KVCache.AI, All Rights Reserved.
 **/
 
 #include "custom_gguf/ops.h"
@@ -20,38 +20,45 @@
 
 PYBIND11_MODULE(KTransformersOps, m) {
 
-    m.def("dequantize_q8_0", [](const intptr_t data, int num_bytes, int blk_size, const int ele_per_blk, torch::Device device, torch::Dtype target_dtype) {
-        return dequantize_q8_0((int8_t*)data, num_bytes, blk_size, ele_per_blk, device, target_dtype);
+    m.def("dequantize_q8_0", [](const intptr_t data, int num_bytes, int blk_size, const int ele_per_blk, torch::Device device, py::object target_dtype) {
+        torch::Dtype dtype = torch::python::detail::py_object_to_dtype(target_dtype);
+        return dequantize_q8_0((int8_t*)data, num_bytes, blk_size, ele_per_blk, device, dtype);
         }, "Function to dequantize q8_0 data.",
         py::arg("data"), py::arg("num_bytes"), py::arg("blk_size"), py::arg("ele_per_blk"), py::arg("device"), py::arg("target_dtype"));
 
-    m.def("dequantize_q6_k", [](const intptr_t data, int num_bytes, int blk_size, const int ele_per_blk, torch::Device device, torch::Dtype target_dtype) {
-        return dequantize_q6_k((int8_t*)data, num_bytes, blk_size, ele_per_blk, device, target_dtype);
+    m.def("dequantize_q6_k", [](const intptr_t data, int num_bytes, int blk_size, const int ele_per_blk, torch::Device device, py::object target_dtype) {
+        torch::Dtype dtype = torch::python::detail::py_object_to_dtype(target_dtype);
+        return dequantize_q6_k((int8_t*)data, num_bytes, blk_size, ele_per_blk, device, dtype);
         }, "Function to dequantize q6_k data.",
         py::arg("data"), py::arg("num_bytes"), py::arg("blk_size"), py::arg("ele_per_blk"), py::arg("device"), py::arg("target_dtype"));
 
-    m.def("dequantize_q5_k", [](const intptr_t data, int num_bytes, int blk_size, const int ele_per_blk, torch::Device device, torch::Dtype target_dtype) {
-        return dequantize_q5_k((int8_t*)data, num_bytes, blk_size, ele_per_blk, device, target_dtype);
+    m.def("dequantize_q5_k", [](const intptr_t data, int num_bytes, int blk_size, const int ele_per_blk, torch::Device device, py::object target_dtype) {
+        torch::Dtype dtype = torch::python::detail::py_object_to_dtype(target_dtype);
+        return dequantize_q5_k((int8_t*)data, num_bytes, blk_size, ele_per_blk, device, dtype);
         }, "Function to dequantize q5_k data.",
         py::arg("data"), py::arg("num_bytes"), py::arg("blk_size"), py::arg("ele_per_blk"), py::arg("device"), py::arg("target_dtype"));
 
-    m.def("dequantize_q4_k", [](const intptr_t data, int num_bytes, int blk_size, const int ele_per_blk, torch::Device device, torch::Dtype target_dtype) {
-        return dequantize_q4_k((int8_t*)data, num_bytes, blk_size, ele_per_blk, device, target_dtype);
+    m.def("dequantize_q4_k", [](const intptr_t data, int num_bytes, int blk_size, const int ele_per_blk, torch::Device device, py::object target_dtype) {
+        torch::Dtype dtype = torch::python::detail::py_object_to_dtype(target_dtype);
+        return dequantize_q4_k((int8_t*)data, num_bytes, blk_size, ele_per_blk, device, dtype);
         }, "Function to dequantize q4_k data.",
         py::arg("data"), py::arg("num_bytes"), py::arg("blk_size"), py::arg("ele_per_blk"), py::arg("device"), py::arg("target_dtype"));
 
-    m.def("dequantize_q3_k", [](const intptr_t data, int num_bytes, int blk_size, const int ele_per_blk, torch::Device device, torch::Dtype target_dtype) {
-        return dequantize_q3_k((int8_t*)data, num_bytes, blk_size, ele_per_blk, device, target_dtype);
+    m.def("dequantize_q3_k", [](const intptr_t data, int num_bytes, int blk_size, const int ele_per_blk, torch::Device device, py::object target_dtype) {
+        torch::Dtype dtype = torch::python::detail::py_object_to_dtype(target_dtype);
+        return dequantize_q3_k((int8_t*)data, num_bytes, blk_size, ele_per_blk, device, dtype);
         }, "Function to dequantize q3_k data.",
         py::arg("data"), py::arg("num_bytes"), py::arg("blk_size"), py::arg("ele_per_blk"), py::arg("device"), py::arg("target_dtype"));
 
-    m.def("dequantize_q2_k", [](const intptr_t data, int num_bytes, int blk_size, const int ele_per_blk, torch::Device device, torch::Dtype target_dtype) {
-        return dequantize_q2_k((int8_t*)data, num_bytes, blk_size, ele_per_blk, device, target_dtype);
+    m.def("dequantize_q2_k", [](const intptr_t data, int num_bytes, int blk_size, const int ele_per_blk, torch::Device device, py::object target_dtype) {
+        torch::Dtype dtype = torch::python::detail::py_object_to_dtype(target_dtype);
+        return dequantize_q2_k((int8_t*)data, num_bytes, blk_size, ele_per_blk, device, dtype);
         }, "Function to dequantize q2_k data.",
         py::arg("data"), py::arg("num_bytes"), py::arg("blk_size"), py::arg("ele_per_blk"), py::arg("device"), py::arg("target_dtype"));
 
-    m.def("dequantize_iq4_xs", [](const intptr_t data, int num_bytes, int blk_size, const int ele_per_blk, torch::Device device, torch::Dtype target_dtype) {
-        return dequantize_iq4_xs((int8_t*)data, num_bytes, blk_size, ele_per_blk, device, target_dtype);
+    m.def("dequantize_iq4_xs", [](const intptr_t data, int num_bytes, int blk_size, const int ele_per_blk, torch::Device device, py::object target_dtype) {
+        torch::Dtype dtype = torch::python::detail::py_object_to_dtype(target_dtype);
+        return dequantize_iq4_xs((int8_t*)data, num_bytes, blk_size, ele_per_blk, device, dtype);
         }, "Function to dequantize iq4_xs data.",
         py::arg("data"), py::arg("num_bytes"), py::arg("blk_size"), py::arg("ele_per_blk"), py::arg("device"), py::arg("target_dtype"));
 
diff --git a/ktransformers/ktransformers_ext/cuda/custom_gguf/ops.h b/ktransformers/ktransformers_ext/cuda/custom_gguf/ops.h
index a52db2d..1740cbf 100644
--- a/ktransformers/ktransformers_ext/cuda/custom_gguf/ops.h
+++ b/ktransformers/ktransformers_ext/cuda/custom_gguf/ops.h
@@ -1,11 +1,11 @@
 /**
- * @Description  :  
+ * @Description  :
  * @Author       : Azure-Tang
  * @Date         : 2024-07-22 09:27:55
  * @Version      : 1.0.0
  * @LastEditors  : kkk1nak0
  * @LastEditTime : 2024-08-12 03:48:46
- * @Copyright (c) 2024 by KVCache.AI, All Rights Reserved. 
+ * @Copyright (c) 2024 by KVCache.AI, All Rights Reserved.
 **/
 #pragma once
 
@@ -13,10 +13,10 @@
 #include <torch/extension.h>
 #include <torch/torch.h>
 
-torch::Tensor dequantize_q8_0(const int8_t* data, const int num_bytes, const int blk_size, const int ele_per_blk, const torch::Device device, const torch::ScalarType target_dtype);
-torch::Tensor dequantize_q6_k(const int8_t* data, const int num_bytes, const int blk_size, const int ele_per_blk, const torch::Device device, const torch::ScalarType target_dtype);
-torch::Tensor dequantize_q5_k(const int8_t* data, const int num_bytes, const int blk_size, const int ele_per_blk, const torch::Device device, const torch::ScalarType target_dtype);
-torch::Tensor dequantize_q4_k(const int8_t* data, const int num_bytes, const int blk_size, const int ele_per_blk, const torch::Device device, const torch::ScalarType target_dtype);
-torch::Tensor dequantize_q3_k(const int8_t* data, const int num_bytes, const int blk_size, const int ele_per_blk, const torch::Device device, const torch::ScalarType target_dtype);
-torch::Tensor dequantize_q2_k(const int8_t* data, const int num_bytes, const int blk_size, const int ele_per_blk, const torch::Device device, const torch::ScalarType target_dtype);
-torch::Tensor dequantize_iq4_xs(const int8_t* data, const int num_bytes, const int blk_size, const int ele_per_blk, const torch::Device device, const torch::ScalarType target_dtype);
+torch::Tensor dequantize_q8_0(const int8_t* data, const int num_bytes, const int blk_size, const int ele_per_blk, const torch::Device device, const torch::Dtype target_dtype);
+torch::Tensor dequantize_q6_k(const int8_t* data, const int num_bytes, const int blk_size, const int ele_per_blk, const torch::Device device, const torch::Dtype target_dtype);
+torch::Tensor dequantize_q5_k(const int8_t* data, const int num_bytes, const int blk_size, const int ele_per_blk, const torch::Device device, const torch::Dtype target_dtype);
+torch::Tensor dequantize_q4_k(const int8_t* data, const int num_bytes, const int blk_size, const int ele_per_blk, const torch::Device device, const torch::Dtype target_dtype);
+torch::Tensor dequantize_q3_k(const int8_t* data, const int num_bytes, const int blk_size, const int ele_per_blk, const torch::Device device, const torch::Dtype target_dtype);
+torch::Tensor dequantize_q2_k(const int8_t* data, const int num_bytes, const int blk_size, const int ele_per_blk, const torch::Device device, const torch::Dtype target_dtype);
+torch::Tensor dequantize_iq4_xs(const int8_t* data, const int num_bytes, const int blk_size, const int ele_per_blk, const torch::Device device, const torch::Dtype target_dtype);