diff --git a/client/rest/build.gradle b/client/rest/build.gradle
index 01c186ed83fc2..0e8930bb7380c 100644
--- a/client/rest/build.gradle
+++ b/client/rest/build.gradle
@@ -33,8 +33,8 @@ import de.thetaphi.forbiddenapis.gradle.CheckForbiddenApis
 apply plugin: 'opensearch.build'
 apply plugin: 'opensearch.publish'
 
-targetCompatibility = JavaVersion.VERSION_11
-sourceCompatibility = JavaVersion.VERSION_11
+targetCompatibility = JavaVersion.VERSION_1_8
+sourceCompatibility = JavaVersion.VERSION_1_8
 
 group = 'org.opensearch.client'
 archivesBaseName = 'opensearch-rest-client'
diff --git a/client/test/build.gradle b/client/test/build.gradle
index 07d874cf01ea7..7d1333a84eae7 100644
--- a/client/test/build.gradle
+++ b/client/test/build.gradle
@@ -29,8 +29,8 @@
  */
 apply plugin: 'opensearch.build'
 
-targetCompatibility = JavaVersion.VERSION_11
-sourceCompatibility = JavaVersion.VERSION_11
+targetCompatibility = JavaVersion.VERSION_1_8
+sourceCompatibility = JavaVersion.VERSION_1_8
 
 group = "${group}.client.test"