diff --git a/java-client-grpc/build.gradle.kts b/java-client-grpc/build.gradle.kts
index cac63af7b3..48a925cfda 100644
--- a/java-client-grpc/build.gradle.kts
+++ b/java-client-grpc/build.gradle.kts
@@ -27,7 +27,7 @@ java {
     withSourcesJar()
 }
 
-val opensearchVersion = "3.5.0"
+val opensearchVersion = "3.8.0"
 val grpcVersion = "1.68.0"
 val protobufVersion = "3.25.5"
 val opensearchProtobufVersion = "1.2.0"
diff --git a/java-client/build.gradle.kts b/java-client/build.gradle.kts
index 4ab3e85e61..eda9b1308d 100644
--- a/java-client/build.gradle.kts
+++ b/java-client/build.gradle.kts
@@ -143,7 +143,7 @@ tasks.build {
     dependsOn("spotlessJavaCheck")
 }
 
-val opensearchVersion = "3.5.0"
+val opensearchVersion = "3.8.0"
 val opensearchDockerVersion = opensearchVersion.removeSuffix("-SNAPSHOT")
 
 tasks.test {