diff --git a/README.md b/README.md
index 84a7276..c2411b8 100644
--- a/README.md
+++ b/README.md
@@ -30,3 +30,5 @@ Run tests using `phpunit --display-warnings test/`
 ## License and authors
 
 Level0 is written by Ilya Zverev and published under WTFPL license.
+
+Thank you to [OpenCage](https://opencagedata.com/) for sponsoring work on Level0!
diff --git a/www/page.php b/www/page.php
index b2f89cd..33e13d1 100644
--- a/www/page.php
+++ b/www/page.php
@@ -69,6 +69,8 @@
 '<a href="https://wiki.openstreetmap.org/wiki/Map_Features">tag reference</a>, '.
 '<a href="https://taginfo.openstreetmap.org/">tag statistics</a>.') ?></p>
 
+<p style="font-style: italic;">Thank you to <a href="https://opencagedata.com/">OpenCage</a> for sponsoring work on Level0!</p>
+
 <?php if( strlen($osccontent) > 0 ): ?>
 <h2 id="osmchange"><?=_('OsmChange contents (this will be uploaded to the server)') ?></h2>
 <pre>