diff --git a/README.md b/README.md
index efdedbb8b..934069372 100644
--- a/README.md
+++ b/README.md
@@ -36,6 +36,8 @@ make
 
 ```
 
+Note: make sure to run ``` scripts/install_build_tools.sh ```to make sure build tools are of correct versions.
+
 ## Build
 
 If you want to bypass the Makefile:
diff --git a/api/service/syncing/downloader/client.go b/api/service/syncing/downloader/client.go
index cdbaba633..17c90171c 100644
--- a/api/service/syncing/downloader/client.go
+++ b/api/service/syncing/downloader/client.go
@@ -44,7 +44,7 @@ func (client *Client) Close() {
 func (client *Client) GetBlockHashes(startHash []byte, size uint32, ip, port string) *pb.DownloaderResponse {
 	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
 	defer cancel()
-	request := &pb.DownloaderRequest{Type: pb.DownloaderRequest_HEADER, BlockHash: startHash, Size: size}
+	request := &pb.DownloaderRequest{Type: pb.DownloaderRequest_BLOCKHASH, BlockHash: startHash, Size: size}
 	request.Ip = ip
 	request.Port = port
 	response, err := client.dlClient.Query(ctx, request)
@@ -54,6 +54,23 @@ func (client *Client) GetBlockHashes(startHash []byte, size uint32, ip, port str
 	return response
 }
 
+// GetBlockHeaders gets block headers in serialization byte array by calling a grpc request.
+func (client *Client) GetBlockHeaders(hashes [][]byte) *pb.DownloaderResponse {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+	request := &pb.DownloaderRequest{Type: pb.DownloaderRequest_BLOCKHEADER}
+	request.Hashes = make([][]byte, len(hashes))
+	for i := range hashes {
+		request.Hashes[i] = make([]byte, len(hashes[i]))
+		copy(request.Hashes[i], hashes[i])
+	}
+	response, err := client.dlClient.Query(ctx, request)
+	if err != nil {
+		utils.Logger().Error().Err(err).Str("target", client.conn.Target()).Msg("[SYNC] downloader/client.go:GetBlockHeaders query failed")
+	}
+	return response
+}
+
 // GetBlocks gets blocks in serialization byte array by calling a grpc request.
 func (client *Client) GetBlocks(hashes [][]byte) *pb.DownloaderResponse {
 	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
diff --git a/api/service/syncing/downloader/gen.sh b/api/service/syncing/downloader/gen.sh
index f44284453..e71559afa 100644
--- a/api/service/syncing/downloader/gen.sh
+++ b/api/service/syncing/downloader/gen.sh
@@ -1 +1,2 @@
-protoc -I proto/ proto/downloader.proto --go_out=plugins=grpc:proto
+SRC_DIR=$(dirname $0)
+protoc -I ${SRC_DIR}/proto/ ${SRC_DIR}/proto/downloader.proto --go_out=plugins=grpc:${SRC_DIR}/proto
diff --git a/api/service/syncing/downloader/proto/downloader.pb.go b/api/service/syncing/downloader/proto/downloader.pb.go
index 02908c622..03e39db71 100644
--- a/api/service/syncing/downloader/proto/downloader.pb.go
+++ b/api/service/syncing/downloader/proto/downloader.pb.go
@@ -25,33 +25,36 @@ const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
 type DownloaderRequest_RequestType int32
 
 const (
-	DownloaderRequest_HEADER          DownloaderRequest_RequestType = 0
+	DownloaderRequest_BLOCKHASH       DownloaderRequest_RequestType = 0
 	DownloaderRequest_BLOCK           DownloaderRequest_RequestType = 1
 	DownloaderRequest_NEWBLOCK        DownloaderRequest_RequestType = 2
 	DownloaderRequest_BLOCKHEIGHT     DownloaderRequest_RequestType = 3
 	DownloaderRequest_REGISTER        DownloaderRequest_RequestType = 4
 	DownloaderRequest_REGISTERTIMEOUT DownloaderRequest_RequestType = 5
 	DownloaderRequest_UNKNOWN         DownloaderRequest_RequestType = 6
+	DownloaderRequest_BLOCKHEADER     DownloaderRequest_RequestType = 7
 )
 
 var DownloaderRequest_RequestType_name = map[int32]string{
-	0: "HEADER",
+	0: "BLOCKHASH",
 	1: "BLOCK",
 	2: "NEWBLOCK",
 	3: "BLOCKHEIGHT",
 	4: "REGISTER",
 	5: "REGISTERTIMEOUT",
 	6: "UNKNOWN",
+	7: "BLOCKHEADER",
 }
 
 var DownloaderRequest_RequestType_value = map[string]int32{
-	"HEADER":          0,
+	"BLOCKHASH":       0,
 	"BLOCK":           1,
 	"NEWBLOCK":        2,
 	"BLOCKHEIGHT":     3,
 	"REGISTER":        4,
 	"REGISTERTIMEOUT": 5,
 	"UNKNOWN":         6,
+	"BLOCKHEADER":     7,
 }
 
 func (x DownloaderRequest_RequestType) String() string {
@@ -135,7 +138,7 @@ func (m *DownloaderRequest) GetType() DownloaderRequest_RequestType {
 	if m != nil {
 		return m.Type
 	}
-	return DownloaderRequest_HEADER
+	return DownloaderRequest_BLOCKHASH
 }
 
 func (m *DownloaderRequest) GetHashes() [][]byte {
@@ -248,32 +251,33 @@ func init() {
 func init() { proto.RegisterFile("downloader.proto", fileDescriptor_6a99ec95c7ab1ff1) }
 
 var fileDescriptor_6a99ec95c7ab1ff1 = []byte{
-	// 399 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x7c, 0x92, 0xc1, 0x6e, 0xd3, 0x40,
-	0x10, 0x86, 0xb3, 0x8e, 0xe3, 0x24, 0x93, 0xd0, 0x2e, 0x03, 0x42, 0xab, 0x0a, 0x90, 0xe5, 0x93,
-	0xb9, 0xf8, 0xd0, 0x9e, 0x38, 0x70, 0x28, 0xee, 0x12, 0x5b, 0x2d, 0x8e, 0x58, 0x3b, 0x54, 0x1c,
-	0x5d, 0xba, 0xaa, 0x2d, 0xaa, 0x7a, 0xf1, 0xba, 0x42, 0xe6, 0x2d, 0x91, 0x78, 0x20, 0xe4, 0x4d,
-	0x5a, 0x5b, 0x02, 0x72, 0xda, 0xf9, 0xff, 0xd9, 0x19, 0xcd, 0x7c, 0x1a, 0xa0, 0xd7, 0xd5, 0x8f,
-	0xbb, 0xdb, 0x2a, 0xbf, 0x96, 0x75, 0xa0, 0xea, 0xaa, 0xa9, 0x10, 0x7a, 0xc7, 0xfb, 0x65, 0xc1,
-	0xd3, 0xb3, 0x47, 0x29, 0xe4, 0xf7, 0x7b, 0xa9, 0x1b, 0x7c, 0x07, 0x76, 0xd3, 0x2a, 0xc9, 0x88,
-	0x4b, 0xfc, 0x83, 0xe3, 0x37, 0xc1, 0xa0, 0xc5, 0x5f, 0x9f, 0x83, 0xdd, 0x9b, 0xb5, 0x4a, 0x0a,
-	0x53, 0x86, 0x2f, 0xc0, 0x29, 0x72, 0x5d, 0x48, 0xcd, 0x2c, 0x77, 0xec, 0x2f, 0xc5, 0x4e, 0xe1,
-	0x11, 0xcc, 0x94, 0x94, 0x75, 0x94, 0xeb, 0x82, 0x8d, 0x5d, 0xe2, 0x2f, 0xc5, 0xa3, 0xc6, 0x97,
-	0x30, 0xbf, 0xba, 0xad, 0xbe, 0x7e, 0x33, 0x49, 0xdb, 0x24, 0x7b, 0x03, 0x0f, 0xc0, 0x2a, 0x15,
-	0x9b, 0xb8, 0xc4, 0x9f, 0x0b, 0xab, 0x54, 0x88, 0x60, 0xab, 0xaa, 0x6e, 0x98, 0x63, 0x1c, 0x13,
-	0x77, 0x9e, 0x2e, 0x7f, 0x4a, 0x36, 0x75, 0x89, 0xff, 0x44, 0x98, 0xd8, 0xd3, 0xb0, 0x18, 0x8c,
-	0x87, 0x00, 0x4e, 0xc4, 0x4f, 0xcf, 0xb8, 0xa0, 0x23, 0x9c, 0xc3, 0xe4, 0xfd, 0xc5, 0x3a, 0x3c,
-	0xa7, 0x04, 0x97, 0x30, 0x4b, 0xf8, 0xe5, 0x56, 0x59, 0x78, 0x08, 0x0b, 0x13, 0x46, 0x3c, 0x5e,
-	0x45, 0x19, 0x1d, 0x77, 0x69, 0xc1, 0x57, 0x71, 0x9a, 0x71, 0x41, 0x6d, 0x7c, 0x06, 0x87, 0x0f,
-	0x2a, 0x8b, 0x3f, 0xf2, 0xf5, 0x26, 0xa3, 0x13, 0x5c, 0xc0, 0x74, 0x93, 0x9c, 0x27, 0xeb, 0xcb,
-	0x84, 0x3a, 0xde, 0x6f, 0x02, 0x38, 0xc4, 0xa4, 0x55, 0x75, 0xa7, 0x25, 0x32, 0x98, 0xaa, 0xbc,
-	0xed, 0x4c, 0x46, 0x0c, 0x96, 0x07, 0x89, 0xab, 0x1d, 0x6e, 0xcb, 0xe0, 0x3e, 0xf9, 0x1f, 0xee,
-	0x6d, 0x9f, 0x40, 0xc8, 0x9b, 0x52, 0x37, 0xbd, 0x31, 0x00, 0xef, 0xc2, 0x62, 0xcb, 0x4c, 0x96,
-	0x37, 0x45, 0x63, 0x18, 0xdb, 0x62, 0x68, 0x79, 0x6f, 0xe1, 0xf9, 0xbf, 0xea, 0xbb, 0x05, 0xd2,
-	0x4d, 0x18, 0xf2, 0x34, 0xa5, 0x23, 0x9c, 0x81, 0xfd, 0xe1, 0x34, 0xbe, 0xa0, 0xa4, 0x03, 0x16,
-	0x27, 0xe9, 0x97, 0x24, 0xa4, 0xd6, 0xf1, 0x67, 0x80, 0x7e, 0x1a, 0x8c, 0x60, 0xf2, 0xe9, 0x5e,
-	0xd6, 0x2d, 0xbe, 0xda, 0x7b, 0x1d, 0x47, 0xaf, 0xf7, 0x6f, 0xe3, 0x8d, 0xae, 0x1c, 0x73, 0x95,
-	0x27, 0x7f, 0x02, 0x00, 0x00, 0xff, 0xff, 0x68, 0xc1, 0xb5, 0x25, 0xa9, 0x02, 0x00, 0x00,
+	// 410 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x7c, 0x52, 0xcd, 0x6e, 0xd3, 0x40,
+	0x10, 0xce, 0x3a, 0x8e, 0x93, 0x4c, 0xd2, 0x76, 0x19, 0x10, 0x5a, 0x55, 0x80, 0x2c, 0x9f, 0xcc,
+	0xc5, 0x87, 0xf6, 0xc4, 0x81, 0x43, 0x70, 0x4d, 0x6c, 0xb5, 0x38, 0x62, 0xed, 0x50, 0x71, 0x74,
+	0xe9, 0xaa, 0xb6, 0xa8, 0xea, 0xc5, 0xeb, 0x0a, 0x99, 0x17, 0xe0, 0x05, 0x79, 0x06, 0x9e, 0x03,
+	0x79, 0x9d, 0xd6, 0x96, 0x80, 0x9c, 0x76, 0xbf, 0x6f, 0x7e, 0x34, 0xf3, 0x7d, 0x03, 0xf4, 0xba,
+	0xfc, 0x7e, 0x77, 0x5b, 0x66, 0xd7, 0xa2, 0xf2, 0x64, 0x55, 0xd6, 0x25, 0x42, 0xcf, 0x38, 0xbf,
+	0x0d, 0x78, 0x72, 0xf6, 0x08, 0xb9, 0xf8, 0x76, 0x2f, 0x54, 0x8d, 0x6f, 0xc1, 0xac, 0x1b, 0x29,
+	0x18, 0xb1, 0x89, 0x7b, 0x78, 0xf2, 0xda, 0x1b, 0xb4, 0xf8, 0x2b, 0xd9, 0xdb, 0xbd, 0x69, 0x23,
+	0x05, 0xd7, 0x65, 0xf8, 0x1c, 0xac, 0x3c, 0x53, 0xb9, 0x50, 0xcc, 0xb0, 0xc7, 0xee, 0x92, 0xef,
+	0x10, 0x1e, 0xc3, 0x4c, 0x0a, 0x51, 0x85, 0x99, 0xca, 0xd9, 0xd8, 0x26, 0xee, 0x92, 0x3f, 0x62,
+	0x7c, 0x01, 0xf3, 0xab, 0xdb, 0xf2, 0xcb, 0x57, 0x1d, 0x34, 0x75, 0xb0, 0x27, 0xf0, 0x10, 0x8c,
+	0x42, 0xb2, 0x89, 0x4d, 0xdc, 0x39, 0x37, 0x0a, 0x89, 0x08, 0xa6, 0x2c, 0xab, 0x9a, 0x59, 0x9a,
+	0xd1, 0xff, 0x96, 0x53, 0xc5, 0x0f, 0xc1, 0xa6, 0x36, 0x71, 0x0f, 0xb8, 0xfe, 0x3b, 0x3f, 0x09,
+	0x2c, 0x06, 0xf3, 0xe1, 0x01, 0xcc, 0xdf, 0x5d, 0x6c, 0xfc, 0xf3, 0x70, 0x95, 0x84, 0x74, 0x84,
+	0x73, 0x98, 0x68, 0x48, 0x09, 0x2e, 0x61, 0x16, 0x07, 0x97, 0x1d, 0x32, 0xf0, 0x08, 0x16, 0x5d,
+	0x5e, 0x10, 0xad, 0xc3, 0x94, 0x8e, 0xdb, 0x30, 0x0f, 0xd6, 0x51, 0x92, 0x06, 0x9c, 0x9a, 0xf8,
+	0x14, 0x8e, 0x1e, 0x50, 0x1a, 0x7d, 0x08, 0x36, 0xdb, 0x94, 0x4e, 0x70, 0x01, 0xd3, 0x6d, 0x7c,
+	0x1e, 0x6f, 0x2e, 0x63, 0x6a, 0x0d, 0x1a, 0xac, 0xce, 0x02, 0x4e, 0xa7, 0xce, 0x2f, 0x02, 0x38,
+	0xd4, 0x4e, 0xc9, 0xf2, 0x4e, 0x09, 0x64, 0x30, 0x95, 0x59, 0xd3, 0x92, 0x8c, 0x68, 0xad, 0x1e,
+	0x20, 0xae, 0x77, 0x1e, 0x18, 0xda, 0x83, 0xd3, 0xff, 0x79, 0xd0, 0xf5, 0xf1, 0xb8, 0xb8, 0x29,
+	0x54, 0xdd, 0x13, 0x03, 0x37, 0x6c, 0x58, 0x74, 0x42, 0x8a, 0xe2, 0x26, 0xaf, 0xb5, 0xf0, 0x26,
+	0x1f, 0x52, 0xce, 0x1b, 0x78, 0xf6, 0xaf, 0xfa, 0x76, 0xa3, 0x64, 0xeb, 0xfb, 0x41, 0x92, 0xd0,
+	0x11, 0xce, 0xc0, 0x7c, 0xbf, 0x8a, 0x2e, 0x28, 0x41, 0x00, 0x2b, 0x8a, 0x93, 0xcf, 0xb1, 0x4f,
+	0x8d, 0x93, 0x4f, 0x00, 0xfd, 0x34, 0x18, 0xc2, 0xe4, 0xe3, 0xbd, 0xa8, 0x1a, 0x7c, 0xb9, 0xf7,
+	0x64, 0x8e, 0x5f, 0xed, 0xdf, 0xc6, 0x19, 0x5d, 0x59, 0xfa, 0x54, 0x4f, 0xff, 0x04, 0x00, 0x00,
+	0xff, 0xff, 0x00, 0xaf, 0x33, 0x33, 0xbe, 0x02, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
diff --git a/api/service/syncing/downloader/proto/downloader.proto b/api/service/syncing/downloader/proto/downloader.proto
index 2c7979f52..9c2aa46eb 100644
--- a/api/service/syncing/downloader/proto/downloader.proto
+++ b/api/service/syncing/downloader/proto/downloader.proto
@@ -10,15 +10,16 @@ service Downloader {
 // DownloaderRequest is the generic download request.
 message DownloaderRequest {
   enum RequestType {
-    HEADER = 0;
+    BLOCKHASH = 0;
     BLOCK = 1;
     NEWBLOCK = 2;
     BLOCKHEIGHT = 3;
     REGISTER = 4;
     REGISTERTIMEOUT = 5;
     UNKNOWN = 6;
+    BLOCKHEADER = 7;
   }
- 
+
   // Request type.
   RequestType type = 1;
 
diff --git a/node/node_syncing.go b/node/node_syncing.go
index 2877e85e7..7f528087f 100644
--- a/node/node_syncing.go
+++ b/node/node_syncing.go
@@ -327,7 +327,7 @@ func (node *Node) SendNewBlockToUnsync() {
 func (node *Node) CalculateResponse(request *downloader_pb.DownloaderRequest, incomingPeer string) (*downloader_pb.DownloaderResponse, error) {
 	response := &downloader_pb.DownloaderResponse{}
 	switch request.Type {
-	case downloader_pb.DownloaderRequest_HEADER:
+	case downloader_pb.DownloaderRequest_BLOCKHASH:
 		if request.BlockHash == nil {
 			return response, fmt.Errorf("[SYNC] GetBlockHashes Request BlockHash is NIL")
 		}
@@ -364,6 +364,21 @@ func (node *Node) CalculateResponse(request *downloader_pb.DownloaderRequest, in
 			response.Payload = append(response.Payload, blockHash[:])
 		}
 
+	case downloader_pb.DownloaderRequest_BLOCKHEADER:
+		for _, bytes := range request.Hashes {
+			var hash common.Hash
+			hash.SetBytes(bytes)
+			blockHeader := node.Blockchain().GetHeaderByHash(hash)
+			if blockHeader == nil {
+				continue
+			}
+			encodedBlockHeader, err := rlp.EncodeToBytes(blockHeader)
+
+			if err == nil {
+				response.Payload = append(response.Payload, encodedBlockHeader)
+			}
+		}
+
 	case downloader_pb.DownloaderRequest_BLOCK:
 		for _, bytes := range request.Hashes {
 			var hash common.Hash