diff --git a/docs/release-notes/index.md b/docs/release-notes/index.md
index 60a050385c9..05f2bdbff57 100644
--- a/docs/release-notes/index.md
+++ b/docs/release-notes/index.md
@@ -128,6 +128,17 @@ Related:
 
 * Add support for SNMPv3 `context engine ID` and `context name` to the `snmptrap` input [#76](https://github.com/logstash-plugins/logstash-integration-snmp/pull/76)
 
+## 9.1.8 [logstash-9.1.8-release-notes]
+
+No user-facing changes in Logstash core.
+
+### Plugins [logstash-plugin-9.1.8-changes]
+
+**Split Filter - 3.1.10**
+
+* Added trace log to track event size expansion [#49](https://github.com/logstash-plugins/logstash-filter-split/pull/49)
+* [DOC] Added introductory statement to clarify purpose of the plugin [#43](https://github.com/logstash-plugins/logstash-filter-split/pull/43)
+
 ## 9.1.7 [logstash-9.1.7-release-notes]
 
 ### Features and enhancements [logstash-9.1.7-features-enhancements]