Update requirements.txt

requirements.txt

@@ -1,14 +1,17 @@
-# HuggingFace Spaces requirements for Lightweight RAG Demo
-# Optimized for fast deployment without heavy dependencies
+# HuggingFace Spaces requirements for Vector RAG Demo
+# Vector search with FAISS and PDF processing
 
 # Core web framework
-gradio==5.35.0
+gradio>=4.0.0
 
-# OpenAI API for LLM
+# OpenAI API for embeddings and LLM
 openai>=1.0.0
 
-# Scientific libraries (minimal)
+# Vector search
+faiss-cpu>=1.7.0
+
+# Scientific libraries
 numpy>=1.24.0
 
-# Utilities
-python-dotenv>=1.0.0
+# PDF processing for parent-page enrichment
+PyMuPDF>=1.23.0