Update requirements.txt

requirements.txt

@@ -1,7 +1,19 @@
-streamlit
-PyPDF2
-langchain>=0.2.0
-langchain-google-genai
-langchain-community
-faiss-cpu
-langchain-text-splitters
+# Core dependencies
+streamlit==1.40.2
+PyPDF2==3.0.1
+
+# LangChain ecosystem
+langchain==0.3.12
+langchain-text-splitters==0.3.4
+langchain-google-genai==2.0.7
+langchain-community==0.3.11
+
+# Vector store
+faiss-cpu==1.9.0.post1
+
+# Google AI
+google-generativeai==0.8.3
+
+# Additional dependencies that might be needed
+numpy<2.0.0
+tiktoken==0.8.0