diff --git a/pkg/guestagent/api/client/client.go b/pkg/guestagent/api/client/client.go
index 8b4cd079f79..cc1a1169d54 100644
--- a/pkg/guestagent/api/client/client.go
+++ b/pkg/guestagent/api/client/client.go
@@ -21,14 +21,18 @@ type GuestAgentClient struct {
 
 func NewGuestAgentClient(dialFn func(ctx context.Context) (net.Conn, error)) (*GuestAgentClient, error) {
 	opts := []grpc.DialOption{
+		grpc.WithTransportCredentials(NewCredentials()),
+		grpc.WithInitialWindowSize(512 << 20),
+		grpc.WithInitialConnWindowSize(512 << 20),
+		grpc.WithReadBufferSize(8 << 20),
+		grpc.WithWriteBufferSize(8 << 20),
 		grpc.WithDefaultCallOptions(
-			grpc.MaxCallRecvMsgSize(math.MaxInt64),
-			grpc.MaxCallSendMsgSize(math.MaxInt64),
+			grpc.MaxCallRecvMsgSize(math.MaxInt32),
+			grpc.MaxCallSendMsgSize(math.MaxInt32),
 		),
 		grpc.WithContextDialer(func(ctx context.Context, _ string) (net.Conn, error) {
 			return dialFn(ctx)
 		}),
-		grpc.WithTransportCredentials(NewCredentials()),
 	}
 
 	resolver.SetDefaultScheme("passthrough")
diff --git a/pkg/guestagent/api/server/server.go b/pkg/guestagent/api/server/server.go
index 296d7c9ec78..ad5124bbab8 100644
--- a/pkg/guestagent/api/server/server.go
+++ b/pkg/guestagent/api/server/server.go
@@ -8,6 +8,7 @@ import (
 	"net"
 
 	"google.golang.org/grpc"
+	"google.golang.org/grpc/keepalive"
 	"google.golang.org/protobuf/types/known/emptypb"
 
 	"github.com/lima-vm/lima/v2/pkg/guestagent"
@@ -16,7 +17,14 @@ import (
 )
 
 func StartServer(lis net.Listener, guest *GuestServer) error {
-	server := grpc.NewServer()
+	server := grpc.NewServer(
+		grpc.InitialWindowSize(512<<20),
+		grpc.InitialConnWindowSize(512<<20),
+		grpc.ReadBufferSize(8<<20),
+		grpc.WriteBufferSize(8<<20),
+		grpc.MaxConcurrentStreams(2048),
+		grpc.KeepaliveParams(keepalive.ServerParameters{Time: 0, Timeout: 0, MaxConnectionIdle: 0}),
+	)
 	api.RegisterGuestServiceServer(server, guest)
 	return server.Serve(lis)
 }