diff --git a/book/index.html b/book/index.html
index dd9c5df20..405578b1e 100644
--- a/book/index.html
+++ b/book/index.html
@@ -907,7 +907,7 @@ document.addEventListener('DOMContentLoaded', fetchGitHubStars);
 </section>
 <section id="want-to-help-out" class="level2 unnumbered">
 <h2 class="unnumbered anchored" data-anchor-id="want-to-help-out">Want to Help Out?</h2>
-<p>This is a collaborative project, and your input matters! If you’d like to contribute, check out our <a href="https://github.com/harvard-edge/cs249r_book/blob/dev/docs/contribute.md">contribution guidelines</a>. Feedback, corrections, and new ideas are welcome. Simply file a GitHub <a href="https://github.com/harvard-edge/cs249r_book/issues">issue</a>.</p>
+<p>This is a collaborative project, and your input matters! If you’d like to contribute, check out our <a href="https://github.com/harvard-edge/cs249r_book/blob/main/book/docs/CONTRIBUTING.md">contribution guidelines</a>. Feedback, corrections, and new ideas are welcome. Simply file a GitHub <a href="https://github.com/harvard-edge/cs249r_book/issues">issue</a>.</p>
 <p>We warmly invite you to join us on this journey by contributing your expertise, feedback, and ideas.</p>