diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index 3e207e2..55bcbf0 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -65,6 +65,7 @@
 	<li>Libraries
 		<ul>
 			<li>Changed default current page indicator in the Pagination library to use &lt;strong&gt; instead of &lt;b&gt;</li>
+			<li>A "HTTP/1.1 400 Bad Request" header is now sent when disallowed characters are encountered.</li>
 		</ul>
 	</li>
 	<li>Helpers