diff --git a/build.gradle b/build.gradle
index dc70ef7..56af1d9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -12,7 +12,7 @@
 buildscript {
   ext {
     opensearch_group = "org.opensearch"
-    opensearch_version = System.getProperty("opensearch.version", "2.17.0-SNAPSHOT")
+    opensearch_version = System.getProperty("opensearch.version", "2.18.0-SNAPSHOT")
     isSnapshot = "true" == System.getProperty("build.snapshot", "true")
     buildVersionQualifier = System.getProperty("build.version_qualifier", "")
   }
diff --git a/bwc-test/build.gradle b/bwc-test/build.gradle
index 68301ea..a5f81ec 100644
--- a/bwc-test/build.gradle
+++ b/bwc-test/build.gradle
@@ -44,7 +44,7 @@ ext {
 
 buildscript {
     ext {
-        opensearch_version = System.getProperty("opensearch.version", "2.17.0-SNAPSHOT")
+        opensearch_version = System.getProperty("opensearch.version", "2.18.0-SNAPSHOT")
         opensearch_group = "org.opensearch"
     }
     repositories {