diff --git a/chainlib/eth/tx.py b/chainlib/eth/tx.py
index c08f212..9ffa460 100644
--- a/chainlib/eth/tx.py
+++ b/chainlib/eth/tx.py
@@ -95,7 +95,11 @@ def pack(tx_src, chain_spec):
             tx_src['r'],
             tx_src['s'],
             ]:
-        for b in bytes.fromhex(strip_0x(a)):
+        try:
+            a = strip_0x(a)
+        except TypeError:
+            a = strip_0x(hex(a)) # believe it or not, eth_tester returns signatures as ints not hex
+        for b in bytes.fromhex(a):
             signature[cursor] = b
             cursor += 1
 
diff --git a/setup.cfg b/setup.cfg
index 62b0423..f2b31e0 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = chainlib-eth
-version = 0.1.0b2
+version = 0.1.0b3
 description = Ethereum implementation of the chainlib interface
 author = Louis Holbrook
 author_email = dev@holbrook.no
diff --git a/tests/test_tx.py b/tests/test_tx.py
index bb86dc7..8dc993a 100644
--- a/tests/test_tx.py
+++ b/tests/test_tx.py
@@ -50,6 +50,19 @@ class TxTestCase(EthTesterCase):
         self.assertTrue(is_same_address(tx['to'], self.accounts[1]))
 
 
+    def test_tx_repack(self):
+        nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
+        gas_oracle = RPCGasOracle(self.rpc)
+        c = Gas(signer=self.signer, nonce_oracle=nonce_oracle, gas_oracle=gas_oracle, chain_spec=self.chain_spec)
+        (tx_hash_hex, o) = c.create(self.accounts[0], self.accounts[1], 1024)
+        self.rpc.do(o)
+
+        o = transaction(tx_hash_hex)
+        tx_src = self.rpc.do(o)
+        tx = Tx(tx_src) 
+        tx_bin = pack(tx.src(), self.chain_spec)
+
+
     def test_tx_pack(self):
         nonce_oracle = RPCNonceOracle(self.accounts[0], self.rpc)
         gas_oracle = RPCGasOracle(self.rpc)