diff --git a/fastdeploy/entrypoints/engine_client.py b/fastdeploy/entrypoints/engine_client.py
index aeb99f33f..fa23aaaee 100644
--- a/fastdeploy/entrypoints/engine_client.py
+++ b/fastdeploy/entrypoints/engine_client.py
@@ -14,6 +14,7 @@
 # limitations under the License.
 """
 
+import inspect
 import os
 import time
 import traceback
@@ -112,7 +113,7 @@ class EngineClient:
         self.zmq_client = ZmqClient(model, mode)
         self.zmq_client.connect()
 
-    def format_and_add_data(self, prompts: dict):
+    async def format_and_add_data(self, prompts: dict):
         """
         Format the request data and send the request to the server.
         """
@@ -123,10 +124,10 @@ class EngineClient:
         if "max_tokens" not in prompts:
             prompts["max_tokens"] = self.max_model_len - 1
 
-        self.add_requests(prompts)
+        await self.add_requests(prompts)
         return prompts["prompt_token_ids"]
 
-    def add_requests(self, task):
+    async def add_requests(self, task):
         """
         Add a new request to the queue.
 
@@ -140,7 +141,10 @@ class EngineClient:
 
         task["preprocess_start_time"] = time.time()
         try:
-            self.data_processor.process_request_dict(task, self.max_model_len)
+            if inspect.iscoroutinefunction(self.data_processor.process_request_dict):
+                await self.data_processor.process_request_dict(task, self.max_model_len)
+            else:
+                self.data_processor.process_request_dict(task, self.max_model_len)
 
             task["prompt_token_ids_len"] = len(task["prompt_token_ids"])
             input_ids_len = task["prompt_token_ids_len"]
diff --git a/fastdeploy/entrypoints/openai/serving_chat.py b/fastdeploy/entrypoints/openai/serving_chat.py
index 16f5f78a0..cddfef634 100644
--- a/fastdeploy/entrypoints/openai/serving_chat.py
+++ b/fastdeploy/entrypoints/openai/serving_chat.py
@@ -119,7 +119,7 @@ class OpenAIServingChat:
                 if "chat_template" not in current_req_dict:
                     current_req_dict["chat_template"] = self.chat_template
                 current_req_dict["arrival_time"] = time.time()
-                prompt_token_ids = self.engine_client.format_and_add_data(current_req_dict)
+                prompt_token_ids = await self.engine_client.format_and_add_data(current_req_dict)
                 text_after_process = current_req_dict.get("text_after_process")
                 if isinstance(prompt_token_ids, np.ndarray):
                     prompt_token_ids = prompt_token_ids.tolist()
diff --git a/fastdeploy/entrypoints/openai/serving_completion.py b/fastdeploy/entrypoints/openai/serving_completion.py
index aa5d5f3c5..3df22de9c 100644
--- a/fastdeploy/entrypoints/openai/serving_completion.py
+++ b/fastdeploy/entrypoints/openai/serving_completion.py
@@ -146,7 +146,7 @@ class OpenAIServingCompletion:
                     request_id_idx = f"{request_id}-{idx}"
                     current_req_dict = request.to_dict_for_infer(request_id_idx, prompt)
                     current_req_dict["arrival_time"] = time.time()
-                    prompt_token_ids = self.engine_client.format_and_add_data(current_req_dict)  # tokenize
+                    prompt_token_ids = await self.engine_client.format_and_add_data(current_req_dict)  # tokenize
                     if isinstance(prompt_token_ids, np.ndarray):
                         prompt_token_ids = prompt_token_ids.tolist()
                     text_after_process_list.append(current_req_dict.get("text_after_process"))
diff --git a/tests/utils/test_custom_chat_template.py b/tests/utils/test_custom_chat_template.py
index acb6be960..71a617044 100644
--- a/tests/utils/test_custom_chat_template.py
+++ b/tests/utils/test_custom_chat_template.py
@@ -70,7 +70,7 @@ class TestLodChatTemplate(unittest.IsolatedAsyncioTestCase):
         ):
             return prompt_token_ids
 
-        def mock_format_and_add_data(current_req_dict):
+        async def mock_format_and_add_data(current_req_dict):
             return current_req_dict
 
         self.chat_completion_handler.chat_completion_full_generator = mock_chat_completion_full_generator
@@ -97,7 +97,7 @@ class TestLodChatTemplate(unittest.IsolatedAsyncioTestCase):
         ):
             return prompt_token_ids
 
-        def mock_format_and_add_data(current_req_dict):
+        async def mock_format_and_add_data(current_req_dict):
             return current_req_dict
 
         self.chat_completion_handler.chat_completion_full_generator = mock_chat_completion_full_generator