diff --git a/README.md b/README.md
index 17a13b79b..b31b0019a 100644
--- a/README.md
+++ b/README.md
@@ -107,7 +107,6 @@ Recently we have started accepting donations via [Patreon](https://www.patreon.c
 
 The following people are making recurring donations:
 
-* [Alexander Matviychuk](https://www.patreon.com/user/creators?u=10203506)
 * [Daniel Gultsch](https://www.patreon.com/user/creators?u=13443518)
 * [Dele Olajide](https://www.patreon.com/user/creators?u=14392041)
 * [Drew Varner](https://www.patreon.com/user/creators?u=8131055)
@@ -119,7 +118,7 @@ The following people are making recurring donations:
 * [Ramesh Jangama](https://www.patreon.com/user/creators?u=14564234)
 * [Tilman Beitter](https://www.patreon.com/spicewiesel/creators)
 * [mt7479](https://www.patreon.com/user/creators?u=3892290)
-* An anonymous backer on Liberapay
+* Two anonymous backers on Liberapay
 
 Additionally this project is supported by
 
diff --git a/docs/source/_templates/sponsors.html b/docs/source/_templates/sponsors.html
index 0c6e7bf14..27313db2b 100644
--- a/docs/source/_templates/sponsors.html
+++ b/docs/source/_templates/sponsors.html
@@ -14,5 +14,9 @@
             <img style="width: 11em" src="/logo/wikisuite.png" alt="WikiSuite">
         </a>
     </li>
+    <li><a href="https://www.b1-systems.de/?utm_source=conversejs" target="_blank" rel="noopener">
+            <img style="width: 5em" src="/logo/b1-systems.svg" alt="B1 Systems">
+        </a>
+    </li>
 </ul>
 <span class="centered-text-container patreon-link-container"><a href="https://conversejs.org#sponsors">Become a sponsor</a></span>
diff --git a/index.html b/index.html
index c6eebe285..1eadc354b 100644
--- a/index.html
+++ b/index.html
@@ -250,6 +250,7 @@
                             <li><a href="https://www.keycdn.com/?utm_source=conversejs" target="_blank" rel="noopener"><img style="height: 3em" src="/logo/keycdn.svg" alt="KeyCDN"></a></li>
                             <li><a href="https://www.codefirst.co.uk/?utm_source=conversejs" target="_blank" rel="noopener"><img style="width: 12em; padding-top: 0.5em" src="/logo/codefirst.png" alt="Codefirst"></a></li>
                             <li><a href="https://wikisuite.org/?utm_source=conversejs" target="_blank" rel="noopener"><img style="height: 4em" src="/logo/wikisuite-white.png" alt="WikiSuite"></a></li>
+                            <li><a href="https://www.b1-systems.de/?utm_source=conversejs" target="_blank" rel="noopener"><img style="height: 5em" src="/logo/b1-systems.svg" alt="WikiSuite"></a></li>
                         </ul>
                     </div>
 
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