diff --git a/build.gradle b/build.gradle
index 17a87631..4a4a5566 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@
 buildscript {
 
     ext {
-        opensearch_version = System.getProperty("opensearch.version", "2.13.0-SNAPSHOT")
+        opensearch_version = System.getProperty("opensearch.version", "2.12.1-SNAPSHOT")
         isSnapshot = "true" == System.getProperty("build.snapshot", "true")
         buildVersionQualifier = System.getProperty("build.version_qualifier", "")