diff --git a/crypto_dev_signer/eth/signer/defaultsigner.py b/crypto_dev_signer/eth/signer/defaultsigner.py
index ff3a6d2..566dc05 100644
--- a/crypto_dev_signer/eth/signer/defaultsigner.py
+++ b/crypto_dev_signer/eth/signer/defaultsigner.py
@@ -40,10 +40,17 @@ class ReferenceSigner(Signer):
         tx.v = v.to_bytes(int(byts), 'big')
         tx.r = z[:32]
         tx.s = z[32:64]
-        if tx.r[0] == 0:
-            tx.r = tx.r[1:]
-        if tx.s[0] == 0:
-            tx.s = tx.s[1:]
+
+        for i in range(len(tx.r)):
+            if tx.r[i] > 0:
+                tx.r = tx.r[i:]
+                break
+
+        for i in range(len(tx.s)):
+            if tx.s[i] > 0:
+                tx.s = tx.s[i:]
+                break
+
         return z
 
 
diff --git a/crypto_dev_signer/eth/transaction.py b/crypto_dev_signer/eth/transaction.py
index 8a29e05..10c3fda 100644
--- a/crypto_dev_signer/eth/transaction.py
+++ b/crypto_dev_signer/eth/transaction.py
@@ -78,7 +78,7 @@ class EIP155Transaction:
         self.sender = strip_hex_prefix(tx['from'])
 
 
-    def rlp_serialize(self):
+    def __canonical_order(self):
         s = [
             self.nonce,
             self.gas_price,
@@ -90,8 +90,22 @@ class EIP155Transaction:
             self.r,
             self.s,
                 ]
+
+        return s
+
+    def bytes_serialize(self):
+        s = self.__canonical_order()
+        b = b''
+        for e in s:
+            b += e
+        return b
+   
+
+    def rlp_serialize(self):
+        s = self.__canonical_order()
         return rlp_encode(s)
 
+
     def serialize(self):
         tx = {
             'nonce': add_hex_prefix(self.nonce.hex()),
diff --git a/setup.py b/setup.py
index f5d1403..9851b8b 100644
--- a/setup.py
+++ b/setup.py
@@ -24,7 +24,7 @@ f.close()
 
 setup(
         name="crypto-dev-signer",
-        version="0.4.13rc3",
+        version="0.4.13rc4",
         description="A signer and keystore daemon and library for cryptocurrency software development",
         author="Louis Holbrook",
         author_email="dev@holbrook.no",