diff --git a/VERSION b/VERSION
index f01291b87f..1cc9c180e2 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.5.7
+1.5.8
diff --git a/common/hexutil/hexutil.go b/common/hexutil/hexutil.go
index 29e6de3335..4ec0ee8e62 100644
--- a/common/hexutil/hexutil.go
+++ b/common/hexutil/hexutil.go
@@ -169,12 +169,7 @@ func EncodeBig(bigint *big.Int) string {
 	if nbits == 0 {
 		return "0x0"
 	}
-	enc := make([]byte, 2, (nbits/8)*2+2)
-	copy(enc, "0x")
-	for i := len(bigint.Bits()) - 1; i >= 0; i-- {
-		enc = strconv.AppendUint(enc, uint64(bigint.Bits()[i]), 16)
-	}
-	return string(enc)
+	return fmt.Sprintf("0x%x", bigint)
 }
 
 func has0xPrefix(input string) bool {
diff --git a/common/hexutil/hexutil_test.go b/common/hexutil/hexutil_test.go
index b58b4745c5..324e9d3481 100644
--- a/common/hexutil/hexutil_test.go
+++ b/common/hexutil/hexutil_test.go
@@ -46,6 +46,7 @@ var (
 		{referenceBig("1"), "0x1"},
 		{referenceBig("ff"), "0xff"},
 		{referenceBig("112233445566778899aabbccddeeff"), "0x112233445566778899aabbccddeeff"},
+		{referenceBig("80a7f2c1bcc396c00"), "0x80a7f2c1bcc396c00"},
 	}
 
 	encodeUint64Tests = []marshalTest{
diff --git a/common/hexutil/json.go b/common/hexutil/json.go
index c36d862b5e..7e4736dd68 100644
--- a/common/hexutil/json.go
+++ b/common/hexutil/json.go
@@ -109,13 +109,8 @@ func (b *Big) MarshalJSON() ([]byte, error) {
 	if nbits == 0 {
 		return jsonZero, nil
 	}
-	enc := make([]byte, 3, (nbits/8)*2+4)
-	copy(enc, `"0x`)
-	for i := len(bigint.Bits()) - 1; i >= 0; i-- {
-		enc = strconv.AppendUint(enc, uint64(bigint.Bits()[i]), 16)
-	}
-	enc = append(enc, '"')
-	return enc, nil
+	enc := fmt.Sprintf(`"0x%x"`, bigint)
+	return []byte(enc), nil
 }
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/les/txrelay.go b/les/txrelay.go
index 844103875a..b0b1673d62 100644
--- a/les/txrelay.go
+++ b/les/txrelay.go
@@ -110,7 +110,6 @@ func (self *LesTxRelay) send(txs types.Transactions, count int) {
 	for p, list := range sendTo {
 		cost := p.GetRequestCost(SendTxMsg, len(list))
 		go func(p *peer, list types.Transactions, cost uint64) {
-			p.fcServer.SendRequest(0, cost)
 			p.SendTxs(cost, list)
 		}(p, list, cost)
 	}
diff --git a/params/version.go b/params/version.go
index 6eb920a21e..b60e105d56 100644
--- a/params/version.go
+++ b/params/version.go
@@ -21,7 +21,7 @@ import "fmt"
 const (
 	VersionMajor = 1          // Major version component of the current release
 	VersionMinor = 5          // Minor version component of the current release
-	VersionPatch = 7          // Patch version component of the current release
+	VersionPatch = 8          // Patch version component of the current release
 	VersionMeta  = "unstable" // Version metadata to append to the version string
 )