Fix #18
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 55927f2..6047f1c 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -447,6 +447,7 @@
- Fixed a bug (#1220) - :doc:`Profiler Library <general/profiling>` didn't display information for database objects that are instantiated inside models.
- Fixed a bug (#1978) - :doc:`Directory Helper <helpers/directory_helper>` function :php:func:`directory_map()`'s return array didn't make a distinction between directories and file indexes when a directory with a numeric name is present.
- Fixed a bug (#777) - :doc:`Loader Library <libraries/loader>` didn't look for helper extensions in added package paths.
+- Fixed a bug (#18) - :doc:`APC Cache <libraries/caching>` driver didn't (un)serialize data, resulting in failure to store objects.
Version 2.1.3
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