[ci skip] Fix #5542
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index c983f1b..966b4cb 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -9,6 +9,7 @@
--------------------
- Fixed a bug (#5526) - :doc:`Session Library <libraries/sessions>` had a syntax error in its 'memcached' driver.
+- Fixed a bug (#5542) - :doc:`Database Forge <database/forge>` method ``modify_column()`` always made fields ``NOT NULL`` when attempting to modify their nullable property under PostgreSQL.
Version 3.1.9
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