diff --git a/README.md b/README.md
index 74aa43a..e500dc6 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 [![CI Status](https://github.com/scito/extract_otp_secret_keys/actions/workflows/ci.yml/badge.svg)](https://github.com/scito/extract_otp_secret_keys/actions/workflows/ci.yml)
 ![PyPI - Python Version](https://img.shields.io/pypi/pyversions/protobuf)
 [![GitHub Pipenv locked Python version](https://img.shields.io/github/pipenv/locked/python-version/scito/extract_otp_secret_keys)](https://github.com/scito/extract_otp_secret_keys/blob/master/Pipfile.lock)
-![protobuf version](https://img.shields.io/badge/protobuf-4.21.8-informational)
+![protobuf version](https://img.shields.io/badge/protobuf-4.21.9-informational)
 [![License](https://img.shields.io/github/license/scito/extract_otp_secret_keys)](https://github.com/scito/extract_otp_secret_keys/blob/master/LICENSE)
 [![GitHub tag (latest SemVer)](https://img.shields.io/github/v/tag/scito/extract_otp_secret_keys?sort=semver&label=version)](https://github.com/scito/extract_otp_secret_keys/tags)
 [![Stand With Ukraine](https://raw.githubusercontent.com/vshymanskyy/StandWithUkraine/main/badges/StandWithUkraine.svg)](https://stand-with-ukraine.pp.ua)
@@ -15,10 +15,12 @@ The secret and otp values can be printed and exported to json or csv. The QR cod
 
 ## Usage
 
-1. Export the QR codes from "Google Authenticator" app
-2. Read QR codes with QR code reader
-3. Save the captured QR codes in a text file. Save each QR code on a new line. (The captured QR codes look like `otpauth-migration://offline?data=...`)
-4. Call this script with the file as input:
+1. Open "Google Authenticator" app on the mobile phone
+2. Export the QR codes from "Google Authenticator" app
+3. Read QR codes with a QR code reader (e.g. from another phone)
+4. Save the captured QR codes in the QR code reader to a text file, e.g. example_export.txt. Save each QR code on a new line. (The captured QR codes look like `otpauth-migration://offline?data=...`)
+5. Transfer the file to the computer where his script is installed.
+6. Call this script with the file as input:
 
         python extract_otp_secret_keys.py example_export.txt
 
@@ -44,7 +46,8 @@ options:
 
 Known to work with
 
-* Python 3.10.7, protobuf 4.21.8, qrcode 7.3.1, and pillow 9.2
+* Python 3.10.8, protobuf 4.21.9, qrcode 7.3.1, and pillow 9.2
+* Python 3.11.0, protobuf 4.21.9, qrcode 7.3.1, and pillow 9.2
 
 For protobuf versions 3.14.0 or similar or Python 3.6, use the extract_otp_secret_keys version 1.4.0.
 
@@ -63,7 +66,7 @@ Command for regeneration of Python code from proto3 message definition file (onl
 
     protoc --python_out=protobuf_generated_python google_auth.proto
 
-The generated protobuf Python code was generated by protoc 21.8 (https://github.com/protocolbuffers/protobuf/releases/tag/v21.8).
+The generated protobuf Python code was generated by protoc 21.9 (https://github.com/protocolbuffers/protobuf/releases/tag/v21.9).
 
 ## References