diff --git a/gradle.properties b/gradle.properties
index 04f816d3..39f07c04 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,2 +1,2 @@
 LOGSTASH_PATH=../../logstash
-ELASTICSEARCH_TREEISH=8.x
+ELASTICSEARCH_TREEISH=8.18