diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 3567ae7..13f856f 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -253,6 +253,7 @@
    -  :doc:`Migration Library <libraries/migration>` changes include:
 	 -  Added support for timestamp-based migrations (enabled by default).
 	 -  Added ``$config['migration_type']`` to allow switching between *sequential* and *timestamp* migrations.
+   -  :doc:`User Agent Library <libraries/user_agent>` will now check if robots are pretending to be mobile clients (helps with e.g. Google indexing mobile website versions).
 
 -  Core