diff --git a/connector/connect/README.md b/connector/connect/README.md
index 1f07f2cb8fbb..2512dce21f45 100644
--- a/connector/connect/README.md
+++ b/connector/connect/README.md
@@ -90,7 +90,7 @@ To use the release version of Spark Connect:
 
 ### Generate proto generated files for the Python client
 1. Install `buf version 1.8.0`: https://docs.buf.build/installation
-2. Run `pip install grpcio==1.48.1 protobuf==4.21.6 mypy-protobuf==3.3.0`
+2. Run `pip install grpcio==1.48.1 protobuf==3.19.4 mypy-protobuf==3.3.0`
 3. Run `./connector/connect/dev/generate_protos.sh`
 4. Optional Check `./dev/check-codegen-python.py`