[ci skip] Fix 5070
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 209193b..00eaeda 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -7,6 +7,10 @@
 
 Release Date: Not Released
 
+Bug fixes for 3.1.5
+-------------------
+
+-  Fixed a bug (#5070) - :doc:`Email Library <libraries/email>` didn't properly detect 7-bit encoding.
 
 Version 3.1.4
 =============