diff --git a/README.md b/README.md
index 0dcc361..f879e4e 100644
--- a/README.md
+++ b/README.md
@@ -2,9 +2,10 @@
 
 [![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)
-![License](https://img.shields.io/github/license/scito/extract_otp_secret_keys)
-![GitHub tag (latest SemVer)](https://img.shields.io/github/v/tag/scito/extract_otp_secret_keys?sort=semver&label=version)
+[![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-4.21.5-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)
 
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