fix 2

requirements.txt

@@ -1,16 +1,17 @@
-fastapi==0.109.2
-uvicorn==0.27.1
-gradio==3.50.2
-rich==13.7.0
-numpy==1.26.4
-python-dotenv==1.0.1
-langchain==0.1.14
-langchain-core==0.1.33
-langchain-community==0.0.29
-langchain-openai==0.1.1
-langchain-nvidia-ai-endpoints==0.0.4
-sentence-transformers==2.5.1
-faiss-cpu==1.8.0
-transformers==4.39.3
-scikit-learn==1.4.1.post1
-rank-bm25==0.2.2
+fastapi
+uvicorn
+gradio
+rich
+numpy
+python-dotenv
+langchain
+langchain-core
+langchain-community
+langchain-openai
+langchain-nvidia-ai-endpoints
+langchain-huggingface
+sentence-transformers
+faiss-cpu
+transformers
+scikit-learn
+rank-bm25