diff --git a/docs/src/docs/asciidoc/index.adoc b/docs/src/docs/asciidoc/index.adoc
index f333d7dd..31dd7138 100644
--- a/docs/src/docs/asciidoc/index.adoc
+++ b/docs/src/docs/asciidoc/index.adoc
@@ -28,6 +28,7 @@ Below are the highlights of what is new in Spring Session 1.2. You can find a co
 
 * Added <<httpsession-jdbc,JdbcOperationsSessionRepository>> (See https://github.com/spring-projects/spring-session/issues/364[#364]).
 * Added <<httpsession-mongo,MongoOperationsSessionRepository>> (See https://github.com/spring-projects/spring-session/pull/371[#371]).
+* SessionRepositoryFilter caches null session lookup (See https://github.com/spring-projects/spring-session/issues/423[#423])
 * Improved Workspace Setup (See https://github.com/spring-projects/spring-session/pull/371[#371])
 
 [[samples]]