diff --git a/CHANGELOG.md b/CHANGELOG.md
index 36b81edf..62edf2a3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
-## UNRELEASED
-  - Releases from `main` are not desired until we get closer to Stack 9.x, and beginning the changelog with something other than release notes matching the version will prevent the plugin release tooling from allowing publication.
+## 9.0.0-prerelease01
+  - Pre-release for 9.0, no functional change [#265](https://github.com/elastic/logstash-filter-elastic_integration/pull/265)
+  - Embeds Ingest Node components from Elasticsearch 9.0.0 prerelease
+  - Compatible with Logstash 8.17+
 
 ## 8.17.1
   - Provides a guidance in logs when plugin version mismatches with connected Elasticsearch `major.minor` version [#255](https://github.com/elastic/logstash-filter-elastic_integration/pull/255)
diff --git a/VERSION b/VERSION
index 8b8c9062..ce78a456 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-8.17.1
+9.0.0-prerelease01
diff --git a/gradle.properties b/gradle.properties
index 89483d25..8b8f9bce 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,2 +1,2 @@
 LOGSTASH_PATH=../../logstash
-ELASTICSEARCH_TREEISH=main
+ELASTICSEARCH_TREEISH=9.0