diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 21f5aae..647ea93 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -11,6 +11,7 @@
 
    -  Updated :doc:`URL Helper <helpers/url_helper>` function :php:func:`auto_link()` to add ``rel="noopener"`` to generated links in order to prevent tab hijacking.
    -  Updated :doc:`Security Library <libraries/security>` method ``xss_clean()`` to also filter JavaScript tag functions.
+   -  Fixed a bug where :doc:`Security Library <libraries/security>` method ``xss_clean()`` didn't check for parentheses around JavaScript's ``document``.
 
 -  General Changes