Update requirements.txt

requirements.txt

@@ -1,9 +1,14 @@
-langchain
-langchain-community
-langchain-huggingface>=0.1.0
-huggingface_hub>=0.28.0
-langchain-classic
-chromadb
-pypdf
-sentence-transformers
-gradio
+# Language & Core
+langchain==0.3.1
+langchain-community==0.3.1
+langchain-huggingface==0.1.0
+langchain-classic==0.0.1
+
+# Vector DB & Processing
+chromadb==0.5.5
+pypdf==4.2.0
+sentence-transformers==3.0.1
+
+# Interface
+gradio==5.1.0
+huggingface-hub==0.28.0