diff --git a/README.markdown b/README.markdown
index 5ac9a5c..75622dd 100644
--- a/README.markdown
+++ b/README.markdown
@@ -101,4 +101,10 @@ You can run the (currently very incomplete) test suite by running `pytest`. You'
 
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+<a target='_blank' rel='nofollow' href='https://app.codesponsor.io/link/QQPuKvw4ZWyUPSAVszC4THyy/codl/forget'>
+  <img alt='Sponsor' width='888' height='68' src='https://app.codesponsor.io/embed/QQPuKvw4ZWyUPSAVszC4THyy/codl/forget.svg' />
+</a>
+
+---
+
 If you're having trouble with Forget, or if you're not having trouble but you just want to tell me you like it, you can drop me a note at [@codl](https://twitter.com/codl) or [codl@codl.fr](mailto:codl@codl.fr). Thanks for reading this readme.