diff --git a/rag/llm/chat_model.py b/rag/llm/chat_model.py
index 820dbec53..a7a088077 100644
--- a/rag/llm/chat_model.py
+++ b/rag/llm/chat_model.py
@@ -871,7 +871,7 @@ class OllamaChat(Base):
         ctx_size = self._calculate_dynamic_ctx(history)
 
         gen_conf["num_ctx"] = ctx_size
-        response = self.client.chat(model=self.model_name, messages=history, options=gen_conf)
+        response = self.client.chat(model=self.model_name, messages=history, options=gen_conf, keep_alive=-1)
         ans = response["message"]["content"].strip()
         token_count = response.get("eval_count", 0) + response.get("prompt_eval_count", 0)
         return ans, token_count
@@ -898,7 +898,7 @@ class OllamaChat(Base):
 
             ans = ""
             try:
-                response = self.client.chat(model=self.model_name, messages=history, stream=True, options=options)
+                response = self.client.chat(model=self.model_name, messages=history, stream=True, options=options, keep_alive=-1)
                 for resp in response:
                     if resp["done"]:
                         token_count = resp.get("prompt_eval_count", 0) + resp.get("eval_count", 0)
diff --git a/rag/llm/cv_model.py b/rag/llm/cv_model.py
index 9be83ace5..82640b56f 100644
--- a/rag/llm/cv_model.py
+++ b/rag/llm/cv_model.py
@@ -506,7 +506,8 @@ class OllamaCV(Base):
             response = self.client.chat(
                 model=self.model_name,
                 messages=history,
-                options=options
+                options=options,
+                keep_alive=-1
             )
 
             ans = response["message"]["content"].strip()
@@ -536,7 +537,8 @@ class OllamaCV(Base):
                 model=self.model_name,
                 messages=history,
                 stream=True,
-                options=options
+                options=options,
+                keep_alive=-1
             )
             for resp in response:
                 if resp["done"]: