diff --git a/pkg/proto/third/third.pb.go b/pkg/proto/third/third.pb.go
index 9314196b5..ed8f349aa 100644
--- a/pkg/proto/third/third.pb.go
+++ b/pkg/proto/third/third.pb.go
@@ -415,7 +415,7 @@ type InitiateMultipartUploadReq struct {
 
 	Hash        string `protobuf:"bytes,1,opt,name=hash,proto3" json:"hash"`
 	Size        int64  `protobuf:"varint,2,opt,name=size,proto3" json:"size"`
-	MaxParts    int64  `protobuf:"varint,3,opt,name=maxParts,proto3" json:"maxParts"`
+	MaxParts    int32  `protobuf:"varint,3,opt,name=maxParts,proto3" json:"maxParts"`
 	Cause       string `protobuf:"bytes,4,opt,name=cause,proto3" json:"cause"`
 	Name        string `protobuf:"bytes,5,opt,name=name,proto3" json:"name"`
 	ContentType string `protobuf:"bytes,6,opt,name=contentType,proto3" json:"contentType"`
@@ -467,7 +467,7 @@ func (x *InitiateMultipartUploadReq) GetSize() int64 {
 	return 0
 }
 
-func (x *InitiateMultipartUploadReq) GetMaxParts() int64 {
+func (x *InitiateMultipartUploadReq) GetMaxParts() int32 {
 	if x != nil {
 		return x.MaxParts
 	}
@@ -1243,7 +1243,7 @@ var file_third_third_proto_rawDesc = []byte{
 	0x12, 0x12, 0x0a, 0x04, 0x68, 0x61, 0x73, 0x68, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04,
 	0x68, 0x61, 0x73, 0x68, 0x12, 0x12, 0x0a, 0x04, 0x73, 0x69, 0x7a, 0x65, 0x18, 0x02, 0x20, 0x01,
 	0x28, 0x03, 0x52, 0x04, 0x73, 0x69, 0x7a, 0x65, 0x12, 0x1a, 0x0a, 0x08, 0x6d, 0x61, 0x78, 0x50,
-	0x61, 0x72, 0x74, 0x73, 0x18, 0x03, 0x20, 0x01, 0x28, 0x03, 0x52, 0x08, 0x6d, 0x61, 0x78, 0x50,
+	0x61, 0x72, 0x74, 0x73, 0x18, 0x03, 0x20, 0x01, 0x28, 0x05, 0x52, 0x08, 0x6d, 0x61, 0x78, 0x50,
 	0x61, 0x72, 0x74, 0x73, 0x12, 0x14, 0x0a, 0x05, 0x63, 0x61, 0x75, 0x73, 0x65, 0x18, 0x04, 0x20,
 	0x01, 0x28, 0x09, 0x52, 0x05, 0x63, 0x61, 0x75, 0x73, 0x65, 0x12, 0x12, 0x0a, 0x04, 0x6e, 0x61,
 	0x6d, 0x65, 0x18, 0x05, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x12, 0x20,
diff --git a/pkg/proto/third/third.proto b/pkg/proto/third/third.proto
index 46b794336..1c99c6728 100644
--- a/pkg/proto/third/third.proto
+++ b/pkg/proto/third/third.proto
@@ -40,7 +40,7 @@ message PartSizeResp {
 message InitiateMultipartUploadReq {
   string hash = 1;
   int64 size = 2;
-  int64 maxParts = 3;
+  int32 maxParts = 3;
   string cause = 4;
   string name = 5;
   string contentType = 6;