diff --git a/notifications/build.gradle b/notifications/build.gradle
index 98eed27c..1e51485b 100644
--- a/notifications/build.gradle
+++ b/notifications/build.gradle
@@ -6,7 +6,7 @@
 
 buildscript {
     ext {
-        opensearch_version = System.getProperty("opensearch.version", "2.9.0-SNAPSHOT")
+        opensearch_version = System.getProperty("opensearch.version", "2.9.1-SNAPSHOT")
         isSnapshot = "true" == System.getProperty("build.snapshot", "true")
         buildVersionQualifier = System.getProperty("build.version_qualifier", "")
         // 2.3.0-SNAPSHOT -> 2.3.0.0-SNAPSHOT