diff --git a/build.gradle b/build.gradle
index ffb10754c..d2158cbd7 100644
--- a/build.gradle
+++ b/build.gradle
@@ -155,12 +155,12 @@ ext {
 allprojects {
     group = opensearch_group
     version = "${opensearch_build}"
-    targetCompatibility = JavaVersion.VERSION_11
-    sourceCompatibility = JavaVersion.VERSION_11
+    targetCompatibility = JavaVersion.VERSION_21
+    sourceCompatibility = JavaVersion.VERSION_21
 
     apply from: rootProject.file('repositories.gradle').absoluteFile
     plugins.withId('java') {
-        sourceCompatibility = targetCompatibility = "11"
+        sourceCompatibility = targetCompatibility = "21"
     }
 
     afterEvaluate {