diff --git a/server/chat/agent_chat.py b/server/chat/agent_chat.py
index 10ac1eb..80313d3 100644
--- a/server/chat/agent_chat.py
+++ b/server/chat/agent_chat.py
@@ -23,7 +23,7 @@ async def agent_chat(query: str = Body(..., description="用户输入", examples
                                                    ),
                      stream: bool = Body(False, description="流式输出"),
                      model_name: str = Body(LLM_MODEL, description="LLM 模型名称。"),
-                     temperature: float = Body(TEMPERATURE, description="LLM 采样温度", gt=0.0, le=1.0),
+                     temperature: float = Body(TEMPERATURE, description="LLM 采样温度", ge=0.0, le=1.0),
                      # top_p: float = Body(TOP_P, description="LLM 核采样。勿与temperature同时设置", gt=0.0, lt=1.0),
                      ):
     history = [History.from_data(h) for h in history]
diff --git a/server/chat/chat.py b/server/chat/chat.py
index 02856ea..15a0250 100644
--- a/server/chat/chat.py
+++ b/server/chat/chat.py
@@ -21,7 +21,7 @@ async def chat(query: str = Body(..., description="用户输入", examples=["恼
                                        ),
                 stream: bool = Body(False, description="流式输出"),
                 model_name: str = Body(LLM_MODEL, description="LLM 模型名称。"),
-                temperature: float = Body(TEMPERATURE, description="LLM 采样温度", gt=0.0, le=1.0),
+                temperature: float = Body(TEMPERATURE, description="LLM 采样温度", ge=0.0, le=1.0),
                 # top_p: float = Body(TOP_P, description="LLM 核采样。勿与temperature同时设置", gt=0.0, lt=1.0),
                 prompt_name: str = Body("llm_chat", description="使用的prompt模板名称(在configs/prompt_config.py中配置)"),
          ):
diff --git a/server/chat/knowledge_base_chat.py b/server/chat/knowledge_base_chat.py
index 0fb7ab4..f5cee99 100644
--- a/server/chat/knowledge_base_chat.py
+++ b/server/chat/knowledge_base_chat.py
@@ -30,7 +30,7 @@ async def knowledge_base_chat(query: str = Body(..., description="用户输入",
                                                       ),
                             stream: bool = Body(False, description="流式输出"),
                             model_name: str = Body(LLM_MODEL, description="LLM 模型名称。"),
-                            temperature: float = Body(TEMPERATURE, description="LLM 采样温度", gt=0.0, le=1.0),
+                            temperature: float = Body(TEMPERATURE, description="LLM 采样温度", ge=0.0, le=1.0),
                             prompt_name: str = Body("knowledge_base_chat", description="使用的prompt模板名称(在configs/prompt_config.py中配置)"),
                             local_doc_url: bool = Body(False, description="知识文件返回本地路径(true)或URL(false)"),
                             request: Request = None,
diff --git a/server/chat/search_engine_chat.py b/server/chat/search_engine_chat.py
index 78246ae..24845aa 100644
--- a/server/chat/search_engine_chat.py
+++ b/server/chat/search_engine_chat.py
@@ -71,7 +71,7 @@ async def search_engine_chat(query: str = Body(..., description="用户输入",
                                                             ),
                             stream: bool = Body(False, description="流式输出"),
                             model_name: str = Body(LLM_MODEL, description="LLM 模型名称。"),
-                            temperature: float = Body(TEMPERATURE, description="LLM 采样温度", gt=0.0, le=1.0),
+                            temperature: float = Body(TEMPERATURE, description="LLM 采样温度", ge=0.0, le=1.0),
                             prompt_name: str = Body("knowledge_base_chat", description="使用的prompt模板名称(在configs/prompt_config.py中配置)"),
                        ):
     if search_engine_name not in SEARCH_ENGINES.keys():
diff --git a/server/knowledge_base/migrate.py b/server/knowledge_base/migrate.py
index b8a95d9..53abecf 100644
--- a/server/knowledge_base/migrate.py
+++ b/server/knowledge_base/migrate.py
@@ -37,8 +37,8 @@ def folder2db(
     mode: Literal["recreate_vs", "update_in_db", "increament"],
     vs_type: Literal["faiss", "milvus", "pg", "chromadb"] = DEFAULT_VS_TYPE,
     embed_model: str = EMBEDDING_MODEL,
-    chunk_size: int = -1,
-    chunk_overlap: int = -1,
+    chunk_size: int = CHUNK_SIZE,
+    chunk_overlap: int = CHUNK_SIZE,
     zh_title_enhance: bool = ZH_TITLE_ENHANCE,
 ):
     '''