diff --git a/Pipfile.lock b/Pipfile.lock
index 336b9fa..08e8161 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -85,23 +85,23 @@
         },
         "protobuf": {
             "hashes": [
-                "sha256:25266bf373ee06d5d66f9eb1ec9d434b243dccce5c32faf151054cfa6f9dcbf1",
-                "sha256:260e346927fd4e6fbb49ab545137b19610c24a1d853dc5f29ddf777ab1987211",
-                "sha256:2c6a4d13732d9b094db31b3841986c38b17ac61a3fe05ee26a779d94c4c3fb43",
-                "sha256:4922e3320ed70e81f05060822da36923d09fd9e04e17f411f2d8d8d0070f9f5c",
-                "sha256:4b75c947289a2e9c1f37d21c593f1ef6fb4fed33977dfb2ac84f799eb29a8ff4",
-                "sha256:4d01ef83517c181d60ea1c6d0b2f644be250ade740d6554a2f5a021b1ad622e3",
-                "sha256:553e35c0878f6855e55f01a14561e6bce6df79b6636a5acf83b9d9ac7eab7922",
-                "sha256:85ccb4753ee21de7dc81a7a68a051f25dbe133ffa01a639ac998427d0b223387",
-                "sha256:a5a14b907a191319e7a58b38c583bbf50deb21e002f723a912c5e4f6969a778e",
-                "sha256:a944dc9550baae276afc7dc8193191d4c2ad660270a1e5ed5a71539817ebe2e2",
-                "sha256:bab4b21a986ded225b9392c07ce21c35d790951f51e1ebfd32e4d443b05c3726",
-                "sha256:c3b9e329b4c247dc3ba5c50f60915a84e08278eb6d9e3fa674d0d04ff816bfd7",
-                "sha256:d91a47c77b33580024b0271b65bb820c4e0264c25eb49151ad01e691de8fa0b6",
-                "sha256:efb16b16fd3eef25357f84d516062753014b76279ce4e0ec4880badd2fba7370"
+                "sha256:1f22ac0ca65bb70a876060d96d914dae09ac98d114294f77584b0d2644fa9c30",
+                "sha256:237216c3326d46808a9f7c26fd1bd4b20015fb6867dc5d263a493ef9a539293b",
+                "sha256:27f4d15021da6d2b706ddc3860fac0a5ddaba34ab679dc182b60a8bb4e1121cc",
+                "sha256:299ea899484ee6f44604deb71f424234f654606b983cb496ea2a53e3c63ab791",
+                "sha256:3d164928ff0727d97022957c2b849250ca0e64777ee31efd7d6de2e07c494717",
+                "sha256:6ab80df09e3208f742c98443b6166bcb70d65f52cfeb67357d52032ea1ae9bec",
+                "sha256:78a28c9fa223998472886c77042e9b9afb6fe4242bd2a2a5aced88e3f4422aa7",
+                "sha256:7cd532c4566d0e6feafecc1059d04c7915aec8e182d1cf7adee8b24ef1e2e6ab",
+                "sha256:89f9149e4a0169cddfc44c74f230d7743002e3aa0b9472d8c28f0388102fc4c2",
+                "sha256:a53fd3f03e578553623272dc46ac2f189de23862e68565e83dde203d41b76fc5",
+                "sha256:b135410244ebe777db80298297a97fbb4c862c881b4403b71bac9d4107d61fd1",
+                "sha256:b98d0148f84e3a3c569e19f52103ca1feacdac0d2df8d6533cf983d1fda28462",
+                "sha256:d1736130bce8cf131ac7957fa26880ca19227d4ad68b4888b3be0dea1f95df97",
+                "sha256:f45460f9ee70a0ec1b6694c6e4e348ad2019275680bd68a1d9314b8c7e01e574"
             ],
             "index": "pypi",
-            "version": "==4.21.11"
+            "version": "==4.21.12"
         },
         "qrcode": {
             "hashes": [
@@ -153,11 +153,11 @@
         },
         "isort": {
             "hashes": [
-                "sha256:6f62d78e2f89b4500b080fe3a81690850cd254227f27f75c3a0c491a1f351ba7",
-                "sha256:e8443a5e7a020e9d7f97f1d7d9cd17c88bcb3bc7e218bf9cf5095fe550be2951"
+                "sha256:dd8bbc5c0990f2a095d754e50360915f73b4c26fc82733eb5bfc6b48396af4d2",
+                "sha256:e486966fba83f25b8045f8dd7455b0a0d1e4de481e1d7ce4669902d9fb85e622"
             ],
-            "markers": "python_version < '4.0' and python_full_version >= '3.6.1'",
-            "version": "==5.10.1"
+            "markers": "python_full_version >= '3.7.0'",
+            "version": "==5.11.2"
         },
         "lazy-object-proxy": {
             "hashes": [
diff --git a/README.md b/README.md
index 40fa49c..f06afbe 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-4.21.11-informational)
+![protobuf version](https://img.shields.io/badge/protobuf-4.21.12-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)
@@ -53,7 +53,7 @@ options:
 Known to work with
 
 * Python 3.10.8, protobuf 4.21.9, qrcode 7.3.1, and pillow 9.2
-* Python 3.11.1, protobuf 4.21.11, qrcode 7.3.1, and pillow 9.2
+* Python 3.11.1, protobuf 4.21.12, 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.
 
@@ -131,7 +131,7 @@ 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 21.11 (https://github.com/protocolbuffers/protobuf/releases/tag/v21.11).
+The generated protobuf Python code was generated by protoc 21.12 (https://github.com/protocolbuffers/protobuf/releases/tag/v21.12).
 
 ## References