diff --git a/singular-index-advanced.php b/singular-index-advanced.php
index e16fbafa..f307b5c3 100644
--- a/singular-index-advanced.php
+++ b/singular-index-advanced.php
@@ -5,6 +5,7 @@
  * @package WordPress
  * @subpackage Fictioneer
  * @since 5.14.0
+ * @since 5.23.1 - Added Transient cache strategy.
  */
 
 
diff --git a/singular-index.php b/singular-index.php
index d09f53e0..a13d29ff 100644
--- a/singular-index.php
+++ b/singular-index.php
@@ -5,6 +5,7 @@
  * @package WordPress
  * @subpackage Fictioneer
  * @since 5.14.0
+ * @since 5.23.1 - Added Transient cache strategy.
  */