diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index c30dd514c4..189f45c60f 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -74,6 +74,7 @@ Changelog
  * Maintenance: Deprecate legacy URL redirects in `ModelViewSet` and `SnippetViewSet` (Sage Abdullah)
  * Maintenance: Simplify code for registering page listing action buttons (Matt Westcott)
  * Maintenance: Removed the unused, legacy, Wagtail userbar views set up for an old iframe approach (Sage Abdullah)
+ * Maintenance: Optimise `lru_cache` usage (Jake Howard)
 
 
 5.1.2 (25.09.2023)
diff --git a/docs/releases/5.2.md b/docs/releases/5.2.md
index 1a8f7f19b5..a0b1f70125 100644
--- a/docs/releases/5.2.md
+++ b/docs/releases/5.2.md
@@ -95,6 +95,7 @@ depth: 1
  * Deprecate legacy URL redirects in `ModelViewSet` and `SnippetViewSet` (Sage Abdullah)
  * Simplify code for registering page listing action buttons (Matt Westcott)
  * Removed the unused, legacy, Wagtail userbar views set up for an old iframe approach (Sage Abdullah)
+ * Optimise `lru_cache` usage (Jake Howard)
 
 
 ## Upgrade considerations - changes affecting all projects