diff --git a/samples/grpc-server-netty-shaded/src/main/java/com/example/demo/GrpcServerService.java b/samples/grpc-server-netty-shaded/src/main/java/com/example/demo/GrpcServerService.java
index c2f01e1..5b9ade0 100644
--- a/samples/grpc-server-netty-shaded/src/main/java/com/example/demo/GrpcServerService.java
+++ b/samples/grpc-server-netty-shaded/src/main/java/com/example/demo/GrpcServerService.java
@@ -2,7 +2,6 @@ package com.example.demo;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import org.springframework.scheduling.annotation.Async;
 import org.springframework.stereotype.Service;
 
 import com.example.demo.proto.HelloReply;
@@ -25,7 +24,6 @@ public class GrpcServerService extends SimpleGrpc.SimpleImplBase {
 	}
 
 	@Override
-	@Async
 	public void streamHello(HelloRequest req, StreamObserver<HelloReply> responseObserver) {
 		log.info("Hello " + req.getName());
 		int count = 0;
diff --git a/samples/grpc-server/src/main/java/org/springframework/grpc/sample/GrpcServerService.java b/samples/grpc-server/src/main/java/org/springframework/grpc/sample/GrpcServerService.java
index a5f0525..ed22c56 100644
--- a/samples/grpc-server/src/main/java/org/springframework/grpc/sample/GrpcServerService.java
+++ b/samples/grpc-server/src/main/java/org/springframework/grpc/sample/GrpcServerService.java
@@ -5,7 +5,6 @@ import org.apache.commons.logging.LogFactory;
 import org.springframework.grpc.sample.proto.HelloReply;
 import org.springframework.grpc.sample.proto.HelloRequest;
 import org.springframework.grpc.sample.proto.SimpleGrpc;
-import org.springframework.scheduling.annotation.Async;
 import org.springframework.stereotype.Service;
 
 import io.grpc.stub.StreamObserver;
@@ -30,7 +29,6 @@ public class GrpcServerService extends SimpleGrpc.SimpleImplBase {
 	}
 
 	@Override
-	@Async
 	public void streamHello(HelloRequest req, StreamObserver<HelloReply> responseObserver) {
 		log.info("Hello " + req.getName());
 		int count = 0;
diff --git a/samples/grpc-tomcat/src/main/java/org/springframework/grpc/sample/GrpcServerService.java b/samples/grpc-tomcat/src/main/java/org/springframework/grpc/sample/GrpcServerService.java
index fdf0ba7..c7ce150 100644
--- a/samples/grpc-tomcat/src/main/java/org/springframework/grpc/sample/GrpcServerService.java
+++ b/samples/grpc-tomcat/src/main/java/org/springframework/grpc/sample/GrpcServerService.java
@@ -5,7 +5,6 @@ import org.apache.commons.logging.LogFactory;
 import org.springframework.grpc.sample.proto.HelloReply;
 import org.springframework.grpc.sample.proto.HelloRequest;
 import org.springframework.grpc.sample.proto.SimpleGrpc;
-import org.springframework.scheduling.annotation.Async;
 import org.springframework.stereotype.Service;
 
 import io.grpc.stub.StreamObserver;
@@ -24,7 +23,6 @@ public class GrpcServerService extends SimpleGrpc.SimpleImplBase {
 	}
 
 	@Override
-	@Async
 	public void streamHello(HelloRequest req, StreamObserver<HelloReply> responseObserver) {
 		log.info("Hello " + req.getName());
 		int count = 0;