diff --git a/contrib/macosx/Readme.html b/contrib/macosx/Readme.html
--- a/contrib/macosx/Readme.html
+++ b/contrib/macosx/Readme.html
@@ -27,7 +27,7 @@
 <p class="p2"><br></p>
 <p class="p3">Visit the <a href="https://mercurial-scm.org/">Mercurial web site and wiki</a></p>
 <p class="p2"><br></p>
-<p class="p3">There's also a free book, <a href="http://hgbook.red-bean.com/">Distributed revision control with Mercurial</a></p>
+<p class="p3">There's also a free book, <a href="https://book.mercurial-scm.org/">Distributed revision control with Mercurial</a></p>
 <p class="p2"><br></p>
 <p class="p1"><b>Reporting problems</b></p>
 <p class="p2"><br></p>
diff --git a/contrib/win32/ReadMe.html b/contrib/win32/ReadMe.html
--- a/contrib/win32/ReadMe.html
+++ b/contrib/win32/ReadMe.html
@@ -51,7 +51,7 @@
       For documentation, please visit the <a
       href="https://mercurial-scm.org/">Mercurial web site</a>.
       You can also download a free book, <a
-      href="http://hgbook.red-bean.com/">Mercurial: The Definitive
+      href="https://book.mercurial-scm.org/">Mercurial: The Definitive
       Guide</a>.
     </p>