diff --git a/setup.cfg b/setup.cfg
index 2886aa4..9a9ac7f 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -26,6 +26,7 @@ classifiers =
 keywords = pytest, random, randomize, randomise, randomly
 project_urls =
     Changelog = https://github.com/pytest-dev/pytest-randomly/blob/main/CHANGELOG.rst
+    Funding = https://adamj.eu/books/
     Mastodon = https://fosstodon.org/@adamchainz
     Twitter = https://twitter.com/adamchainz