diff --git a/intel_extension_for_transformers/neural_chat/pipeline/plugins/retrieval/requirements.txt b/intel_extension_for_transformers/neural_chat/pipeline/plugins/retrieval/requirements.txt
index 617ce46b8d7..beddc65a916 100644
--- a/intel_extension_for_transformers/neural_chat/pipeline/plugins/retrieval/requirements.txt
+++ b/intel_extension_for_transformers/neural_chat/pipeline/plugins/retrieval/requirements.txt
@@ -9,7 +9,7 @@ langchain_core==0.1.35
 langid
 markdown
 openpyxl
-protobuf==3.20
+protobuf==3.20.2
 PyMuPDF
 python-docx
 qdrant-client==1.9.0