[ci skip] Add changelog entry for PR #5170
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 77648a9..b1dc618 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -7,6 +7,10 @@
 
 Release Date: Not Released
 
+-  General Changes
+
+   -  Updated the :doc:`Session Library <libraries/sessions>` 'redis', 'memcached' drivers to reduce the potential of a locking race conditions.
+
 
 Bug fixes for 3.1.6
 -------------------