diff --git a/infra/conf/grpc.go b/infra/conf/grpc.go
index 0fbe9f34..f4d97af5 100644
--- a/infra/conf/grpc.go
+++ b/infra/conf/grpc.go
@@ -12,6 +12,7 @@ type GRPCConfig struct {
 	IdleTimeout         int32  `json:"idle_timeout"`
 	HealthCheckTimeout  int32  `json:"health_check_timeout"`
 	PermitWithoutStream bool   `json:"permit_without_stream"`
+	InitialWindowsSize  int32  `json:"initial_windows_size"`
 }
 
 func (g *GRPCConfig) Build() (proto.Message, error) {
@@ -21,11 +22,17 @@ func (g *GRPCConfig) Build() (proto.Message, error) {
 	if g.HealthCheckTimeout <= 0 {
 		g.HealthCheckTimeout = 0
 	}
+	if g.InitialWindowsSize < 0 {
+		// default window size of gRPC-go
+		g.InitialWindowsSize = 0
+	}
+
 	return &grpc.Config{
 		ServiceName:         g.ServiceName,
 		MultiMode:           g.MultiMode,
 		IdleTimeout:         g.IdleTimeout,
 		HealthCheckTimeout:  g.HealthCheckTimeout,
 		PermitWithoutStream: g.PermitWithoutStream,
+		InitialWindowsSize:  g.InitialWindowsSize,
 	}, nil
 }
diff --git a/transport/internet/grpc/config.pb.go b/transport/internet/grpc/config.pb.go
index 8d1f0156..e76847e6 100644
--- a/transport/internet/grpc/config.pb.go
+++ b/transport/internet/grpc/config.pb.go
@@ -31,6 +31,7 @@ type Config struct {
 	IdleTimeout         int32  `protobuf:"varint,4,opt,name=idle_timeout,json=idleTimeout,proto3" json:"idle_timeout,omitempty"`
 	HealthCheckTimeout  int32  `protobuf:"varint,5,opt,name=health_check_timeout,json=healthCheckTimeout,proto3" json:"health_check_timeout,omitempty"`
 	PermitWithoutStream bool   `protobuf:"varint,6,opt,name=permit_without_stream,json=permitWithoutStream,proto3" json:"permit_without_stream,omitempty"`
+	InitialWindowsSize  int32  `protobuf:"varint,7,opt,name=initial_windows_size,json=initialWindowsSize,proto3" json:"initial_windows_size,omitempty"`
 }
 
 func (x *Config) Reset() {
@@ -107,6 +108,13 @@ func (x *Config) GetPermitWithoutStream() bool {
 	return false
 }
 
+func (x *Config) GetInitialWindowsSize() int32 {
+	if x != nil {
+		return x.InitialWindowsSize
+	}
+	return 0
+}
+
 var File_transport_internet_grpc_config_proto protoreflect.FileDescriptor
 
 var file_transport_internet_grpc_config_proto_rawDesc = []byte{
@@ -114,7 +122,7 @@ var file_transport_internet_grpc_config_proto_rawDesc = []byte{
 	0x72, 0x6e, 0x65, 0x74, 0x2f, 0x67, 0x72, 0x70, 0x63, 0x2f, 0x63, 0x6f, 0x6e, 0x66, 0x69, 0x67,
 	0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x25, 0x78, 0x72, 0x61, 0x79, 0x2e, 0x74, 0x72, 0x61,
 	0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2e,
-	0x67, 0x72, 0x70, 0x63, 0x2e, 0x65, 0x6e, 0x63, 0x6f, 0x64, 0x69, 0x6e, 0x67, 0x22, 0xe7, 0x01,
+	0x67, 0x72, 0x70, 0x63, 0x2e, 0x65, 0x6e, 0x63, 0x6f, 0x64, 0x69, 0x6e, 0x67, 0x22, 0x99, 0x02,
 	0x0a, 0x06, 0x43, 0x6f, 0x6e, 0x66, 0x69, 0x67, 0x12, 0x12, 0x0a, 0x04, 0x68, 0x6f, 0x73, 0x74,
 	0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x68, 0x6f, 0x73, 0x74, 0x12, 0x21, 0x0a, 0x0c,
 	0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x5f, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x02, 0x20, 0x01,
@@ -129,11 +137,14 @@ var file_transport_internet_grpc_config_proto_rawDesc = []byte{
 	0x6f, 0x75, 0x74, 0x12, 0x32, 0x0a, 0x15, 0x70, 0x65, 0x72, 0x6d, 0x69, 0x74, 0x5f, 0x77, 0x69,
 	0x74, 0x68, 0x6f, 0x75, 0x74, 0x5f, 0x73, 0x74, 0x72, 0x65, 0x61, 0x6d, 0x18, 0x06, 0x20, 0x01,
 	0x28, 0x08, 0x52, 0x13, 0x70, 0x65, 0x72, 0x6d, 0x69, 0x74, 0x57, 0x69, 0x74, 0x68, 0x6f, 0x75,
-	0x74, 0x53, 0x74, 0x72, 0x65, 0x61, 0x6d, 0x42, 0x33, 0x5a, 0x31, 0x67, 0x69, 0x74, 0x68, 0x75,
-	0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61, 0x79, 0x2d,
-	0x63, 0x6f, 0x72, 0x65, 0x2f, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74, 0x2f, 0x69,
-	0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2f, 0x67, 0x72, 0x70, 0x63, 0x62, 0x06, 0x70, 0x72,
-	0x6f, 0x74, 0x6f, 0x33,
+	0x74, 0x53, 0x74, 0x72, 0x65, 0x61, 0x6d, 0x12, 0x30, 0x0a, 0x14, 0x69, 0x6e, 0x69, 0x74, 0x69,
+	0x61, 0x6c, 0x5f, 0x77, 0x69, 0x6e, 0x64, 0x6f, 0x77, 0x73, 0x5f, 0x73, 0x69, 0x7a, 0x65, 0x18,
+	0x07, 0x20, 0x01, 0x28, 0x05, 0x52, 0x12, 0x69, 0x6e, 0x69, 0x74, 0x69, 0x61, 0x6c, 0x57, 0x69,
+	0x6e, 0x64, 0x6f, 0x77, 0x73, 0x53, 0x69, 0x7a, 0x65, 0x42, 0x33, 0x5a, 0x31, 0x67, 0x69, 0x74,
+	0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x78, 0x74, 0x6c, 0x73, 0x2f, 0x78, 0x72, 0x61,
+	0x79, 0x2d, 0x63, 0x6f, 0x72, 0x65, 0x2f, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x70, 0x6f, 0x72, 0x74,
+	0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x65, 0x74, 0x2f, 0x67, 0x72, 0x70, 0x63, 0x62, 0x06,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/transport/internet/grpc/config.proto b/transport/internet/grpc/config.proto
index c402e1a9..7d256b2c 100644
--- a/transport/internet/grpc/config.proto
+++ b/transport/internet/grpc/config.proto
@@ -10,4 +10,5 @@ message Config {
   int32 idle_timeout = 4;
   int32 health_check_timeout = 5;
   bool permit_without_stream = 6;
+  int32 initial_windows_size = 7;
 }
diff --git a/transport/internet/grpc/dial.go b/transport/internet/grpc/dial.go
index e4b942d5..50b09734 100644
--- a/transport/internet/grpc/dial.go
+++ b/transport/internet/grpc/dial.go
@@ -135,6 +135,10 @@ func getGrpcClient(ctx context.Context, dest net.Destination, streamSettings *in
 		}))
 	}
 
+	if grpcSettings.InitialWindowsSize > 0 {
+		dialOptions = append(dialOptions, grpc.WithInitialWindowSize(grpcSettings.InitialWindowsSize))
+	}
+
 	var grpcDestHost string
 	if dest.Address.Family().IsDomain() {
 		grpcDestHost = dest.Address.Domain()