diff --git a/chainlib/eth/pytest/fixtures_ethtester.py b/chainlib/eth/pytest/fixtures_ethtester.py
index 303794c..61b0b44 100644
--- a/chainlib/eth/pytest/fixtures_ethtester.py
+++ b/chainlib/eth/pytest/fixtures_ethtester.py
@@ -12,6 +12,7 @@ from crypto_dev_signer.keystore.dict import DictKeystore
 from chainlib.eth.unittest.base import *
 from chainlib.connection import (
         RPCConnection,
+        ConnType,
         )
 from chainlib.eth.unittest.ethtester import create_tester_signer
 from chainlib.eth.address import to_checksum_address
@@ -97,6 +98,8 @@ def init_eth_rpc(
     def rpc_with_tester(url=None, chain_spec=default_chain_spec):
         return rpc_conn
 
-    RPCConnection.register_location('custom', default_chain_spec, tag='default', constructor=rpc_with_tester, exist_ok=True)
-    RPCConnection.register_location('custom', default_chain_spec, tag='signer', constructor=rpc_with_tester, exist_ok=True)
+    RPCConnection.register_constructor(ConnType.CUSTOM, rpc_with_tester, tag='default')
+    RPCConnection.register_constructor(ConnType.CUSTOM, rpc_with_tester, tag='signer')
+    RPCConnection.register_location('custom', default_chain_spec, tag='default', exist_ok=True)
+    RPCConnection.register_location('custom', default_chain_spec, tag='signer', exist_ok=True)
     return None
diff --git a/requirements.txt b/requirements.txt
index c6edea0..ae265d8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-crypto-dev-signer~=0.4.14b2
+crypto-dev-signer~=0.4.14b3
 pysha3==1.0.2
 hexathon~=0.0.1a7
 websocket-client==0.57.0
diff --git a/setup.cfg b/setup.cfg
index 9554f95..c32facb 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = chainlib
-version = 0.0.2a17
+version = 0.0.2a19
 description = Generic blockchain access library and tooling
 author = Louis Holbrook
 author_email = dev@holbrook.no