diff --git a/setup.cfg b/setup.cfg
index 2c1baa28..f28f83cf 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -41,6 +41,7 @@ keywords =
     api
 project_urls =
     Changelog = https://github.com/adamchainz/django-cors-headers/blob/main/CHANGELOG.rst
+    Funding = https://adamj.eu/books/
     Mastodon = https://fosstodon.org/@adamchainz
     Twitter = https://twitter.com/adamchainz