diff --git a/application/llm/llama_cpp.py b/application/llm/llama_cpp.py
index a93fa686..804c3c56 100644
--- a/application/llm/llama_cpp.py
+++ b/application/llm/llama_cpp.py
@@ -1,8 +1,10 @@
 from application.llm.base import BaseLLM
 from application.core.settings import settings
+import threading
 
 class LlamaSingleton:
     _instances = {}
+    _lock = threading.Lock()  # Add a lock for thread synchronization
 
     @classmethod
     def get_instance(cls, llm_name):
@@ -16,6 +18,12 @@ class LlamaSingleton:
             cls._instances[llm_name] = Llama(model_path=llm_name, n_ctx=2048)
         return cls._instances[llm_name]
 
+    @classmethod
+    def query_model(cls, llm, prompt, **kwargs):
+        with cls._lock:
+            return llm(prompt, **kwargs)
+
+
 class LlamaCpp(BaseLLM):
     def __init__(
         self,
@@ -34,14 +42,14 @@ class LlamaCpp(BaseLLM):
         context = messages[0]["content"]
         user_question = messages[-1]["content"]
         prompt = f"### Instruction \n {user_question} \n ### Context \n {context} \n ### Answer \n"
-        result = self.llama(prompt, max_tokens=150, echo=False)
+        result = LlamaSingleton.query_model(self.llama, prompt, max_tokens=150, echo=False)
         return result["choices"][0]["text"].split("### Answer \n")[-1]
 
     def _raw_gen_stream(self, baseself, model, messages, stream=True, **kwargs):
         context = messages[0]["content"]
         user_question = messages[-1]["content"]
         prompt = f"### Instruction \n {user_question} \n ### Context \n {context} \n ### Answer \n"
-        result = self.llama(prompt, max_tokens=150, echo=False, stream=stream)
+        result = LlamaSingleton.query_model(self.llama, prompt, max_tokens=150, echo=False, stream=stream)
         for item in result:
             for choice in item["choices"]:
                 yield choice["text"]
\ No newline at end of file