diff --git a/pilot/vector_store/extract_tovec.py b/pilot/vector_store/extract_tovec.py
index e571ac54f..ccfe7bda0 100644
--- a/pilot/vector_store/extract_tovec.py
+++ b/pilot/vector_store/extract_tovec.py
@@ -34,7 +34,7 @@ def knownledge_tovec_st(filename):
   
     text_splitter = CharacterTextSplitter(chunk_size=1000, chunk_overlap=0)
 
-    texts = text_splitter(knownledge)
+    texts = text_splitter.split_text(knownledge)
     docsearch = Chroma.from_texts(texts, embeddings, metadatas=[{"source": str(i)} for i in range(len(texts))])
     return docsearch
 
diff --git a/requirements.txt b/requirements.txt
index 50354b3b4..f0ddf8fb5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -50,4 +50,6 @@ notebook
 gradio==3.24.1
 gradio-client==0.0.8
 wandb
-fschat=0.1.10
\ No newline at end of file
+fschat=0.1.10
+llama-index=0.5.27
+pymysql
\ No newline at end of file