diff --git a/ping/ping.pb.go b/ping/ping.pb.go
index 8c93921..f0c6297 100644
--- a/ping/ping.pb.go
+++ b/ping/ping.pb.go
@@ -25,7 +25,7 @@ type PingRequest struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Seq  uint32 `protobuf:"varint,1,opt,name=seq,proto3" json:"seq,omitempty"`
+	Seq  uint64 `protobuf:"varint,1,opt,name=seq,proto3" json:"seq,omitempty"`
 	Data string `protobuf:"bytes,2,opt,name=data,proto3" json:"data,omitempty"`
 }
 
@@ -61,7 +61,7 @@ func (*PingRequest) Descriptor() ([]byte, []int) {
 	return file_ping_ping_proto_rawDescGZIP(), []int{0}
 }
 
-func (x *PingRequest) GetSeq() uint32 {
+func (x *PingRequest) GetSeq() uint64 {
 	if x != nil {
 		return x.Seq
 	}
@@ -80,7 +80,7 @@ type PingResponse struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Seq  uint32 `protobuf:"varint,1,opt,name=seq,proto3" json:"seq,omitempty"`
+	Seq  uint64 `protobuf:"varint,1,opt,name=seq,proto3" json:"seq,omitempty"`
 	Data string `protobuf:"bytes,2,opt,name=data,proto3" json:"data,omitempty"`
 }
 
@@ -116,7 +116,7 @@ func (*PingResponse) Descriptor() ([]byte, []int) {
 	return file_ping_ping_proto_rawDescGZIP(), []int{1}
 }
 
-func (x *PingResponse) GetSeq() uint32 {
+func (x *PingResponse) GetSeq() uint64 {
 	if x != nil {
 		return x.Seq
 	}
@@ -136,16 +136,16 @@ var file_ping_ping_proto_rawDesc = []byte{
 	0x0a, 0x0f, 0x70, 0x69, 0x6e, 0x67, 0x2f, 0x70, 0x69, 0x6e, 0x67, 0x2e, 0x70, 0x72, 0x6f, 0x74,
 	0x6f, 0x12, 0x04, 0x70, 0x69, 0x6e, 0x67, 0x22, 0x33, 0x0a, 0x0b, 0x50, 0x69, 0x6e, 0x67, 0x52,
 	0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x12, 0x10, 0x0a, 0x03, 0x73, 0x65, 0x71, 0x18, 0x01, 0x20,
-	0x01, 0x28, 0x0d, 0x52, 0x03, 0x73, 0x65, 0x71, 0x12, 0x12, 0x0a, 0x04, 0x64, 0x61, 0x74, 0x61,
+	0x01, 0x28, 0x04, 0x52, 0x03, 0x73, 0x65, 0x71, 0x12, 0x12, 0x0a, 0x04, 0x64, 0x61, 0x74, 0x61,
 	0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x64, 0x61, 0x74, 0x61, 0x22, 0x34, 0x0a, 0x0c,
 	0x50, 0x69, 0x6e, 0x67, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x10, 0x0a, 0x03,
-	0x73, 0x65, 0x71, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0d, 0x52, 0x03, 0x73, 0x65, 0x71, 0x12, 0x12,
+	0x73, 0x65, 0x71, 0x18, 0x01, 0x20, 0x01, 0x28, 0x04, 0x52, 0x03, 0x73, 0x65, 0x71, 0x12, 0x12,
 	0x0a, 0x04, 0x64, 0x61, 0x74, 0x61, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x64, 0x61,
 	0x74, 0x61, 0x32, 0x37, 0x0a, 0x04, 0x70, 0x69, 0x6e, 0x67, 0x12, 0x2f, 0x0a, 0x04, 0x50, 0x69,
 	0x6e, 0x67, 0x12, 0x11, 0x2e, 0x70, 0x69, 0x6e, 0x67, 0x2e, 0x50, 0x69, 0x6e, 0x67, 0x52, 0x65,
 	0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x12, 0x2e, 0x70, 0x69, 0x6e, 0x67, 0x2e, 0x50, 0x69, 0x6e,
-	0x67, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x42, 0x10, 0x5a, 0x0e, 0x6c,
-	0x75, 0x6d, 0x65, 0x2d, 0x67, 0x72, 0x70, 0x63, 0x2f, 0x70, 0x69, 0x6e, 0x67, 0x62, 0x06, 0x70,
+	0x67, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x42, 0x10, 0x5a, 0x0e, 0x67,
+	0x72, 0x70, 0x63, 0x2d, 0x70, 0x69, 0x6e, 0x67, 0x2f, 0x70, 0x69, 0x6e, 0x67, 0x62, 0x06, 0x70,
 	0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
diff --git a/ping/ping.proto b/ping/ping.proto
index f1a3d39..2a9b748 100644
--- a/ping/ping.proto
+++ b/ping/ping.proto
@@ -9,11 +9,11 @@ service ping {
 }
 
 message PingRequest {
-    uint32 seq  = 1;
+    uint64 seq  = 1;
     string data = 2;
 }
 
 message PingResponse {
-    uint32 seq  = 1;
+    uint64 seq  = 1;
     string data = 2;
 }
diff --git a/ping_client/main.go b/ping_client/main.go
index eb71e7f..bd2e679 100644
--- a/ping_client/main.go
+++ b/ping_client/main.go
@@ -26,7 +26,7 @@ func genPayload(s int) string {
 }
 
 func main() {
-	var i uint32
+	var i uint64
 	ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
 	defer cancel()