diff --git a/alerting/build.gradle b/alerting/build.gradle
index a173dfcba..5b69b4e6a 100644
--- a/alerting/build.gradle
+++ b/alerting/build.gradle
@@ -127,7 +127,7 @@ configurations {
 // This flag indicates the existence of security plugin
 def securityEnabled = System.getProperty("security", "false") == "true" || System.getProperty("https", "false") == "true"
 
-// Always be minimumCompatibilityVersion of current opensearch version(3.3.0)
+// Always be minimumCompatibilityVersion of current opensearch version(3.4.0)
 // get latest 3.x version from OpenSearch
 static def fetchVersionProperties() {
     def url = 'https://raw.githubusercontent.com/opensearch-project/OpenSearch/refs/heads/3.2/buildSrc/version.properties'
diff --git a/build.gradle b/build.gradle
index 94586e151..8824676e8 100644
--- a/build.gradle
+++ b/build.gradle
@@ -7,7 +7,7 @@ buildscript {
     apply from: 'build-tools/repositories.gradle'
 
     ext {
-        opensearch_version = System.getProperty("opensearch.version", "3.3.0-SNAPSHOT")
+        opensearch_version = System.getProperty("opensearch.version", "3.4.0-SNAPSHOT")
         buildVersionQualifier = System.getProperty("build.version_qualifier", "")
         isSnapshot = "true" == System.getProperty("build.snapshot", "true")
         // 3.0.0-SNAPSHOT -> 3.0.0.0-SNAPSHOT