diff --git a/requirement.txt b/requirement.txt
index 28a34ba..0e62cf3 100644
--- a/requirement.txt
+++ b/requirement.txt
@@ -1,6 +1,5 @@
 # Core
-torch>=2.0.0
-transformers>=4.35.0
+transformers>=4.35.0  # 仅用于分词器，不需要模型推理
 pypdf>=3.0.0
 pandas>=2.0.0
 requests>=2.31.0
@@ -9,9 +8,13 @@ beautifulsoup4>=4.12.0
 # LangChain ecosystem
 langchain>=0.1.0
 langchain-community>=0.0.10
-langchain-huggingface>=0.0.3
+# langchain-huggingface>=0.0.3  # 注释：如使用在线 Embedding API 则不需要
 langchain-core>=0.1.0
 langchain-openai>=0.0.5
+langchain-text-splitters>=0.1.0
+
+# Vector Database
+chromadb>=0.4.0  # 轻量级向量数据库，可选 torch 但不强制
 
 # LangGraph
 langgraph>=0.0.30