diff --git a/python/eth_contract_registry/runnable/deploy.py b/python/eth_contract_registry/runnable/deploy.py
index ae64e27..c4c79c0 100644
--- a/python/eth_contract_registry/runnable/deploy.py
+++ b/python/eth_contract_registry/runnable/deploy.py
@@ -12,7 +12,7 @@ import json
 import argparse
 import logging
 
-# third-party imports
+# external imports
 from crypto_dev_signer.eth.signer import ReferenceSigner as EIP155Signer
 from crypto_dev_signer.keystore.dict import DictKeystore
 from crypto_dev_signer.eth.helper import EthTxExecutor
@@ -23,7 +23,7 @@ from chainlib.eth.connection import EthHTTPConnection
 from chainlib.eth.tx import receipt
 
 # local imports
-from contract_registry import Registry
+from eth_contract_registry import Registry
 
 logging.basicConfig(level=logging.WARNING)
 logg = logging.getLogger()
@@ -39,7 +39,7 @@ argparser.add_argument('-i', '--chain-spec', dest='i', type=str, default='Ethere
 argparser.add_argument('-y', '--key-file', dest='y', type=str, help='Ethereum keystore file to use for signing')
 argparser.add_argument('-v', action='store_true', help='Be verbose')
 argparser.add_argument('-vv', action='store_true', help='Be more verbose')
-argparser.add_argument('--identifier', type=str, action='append', help='Add contract identifier')
+argparser.add_argument('--identifier', type=str, action='append', default=[], help='Add contract identifier')
 argparser.add_argument('--env-prefix', default=os.environ.get('CONFINI_ENV_PREFIX'), dest='env_prefix', type=str, help='environment prefix for variables to overwrite configuration')
 args = argparser.parse_args()
 
diff --git a/python/eth_contract_registry/runnable/set.py b/python/eth_contract_registry/runnable/set.py
index aff4639..2ec958d 100644
--- a/python/eth_contract_registry/runnable/set.py
+++ b/python/eth_contract_registry/runnable/set.py
@@ -24,7 +24,7 @@ from chainlib.eth.tx import receipt
 from chainlib.eth.constant import ZERO_CONTENT
 
 # local imports
-from contract_registry import Registry
+from eth_contract_registry import Registry
 
 logging.basicConfig(level=logging.WARNING)
 logg = logging.getLogger()
diff --git a/python/gmon.out b/python/gmon.out
index 8278485..c392892 100644
Binary files a/python/gmon.out and b/python/gmon.out differ
diff --git a/python/requirements.txt b/python/requirements.txt
index a9ab27f..da856e3 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -1,3 +1,3 @@
 confini~=0.3.6rc3
-crypto-dev-signer~=0.4.14a4
-chainlib~=0.0.1a28
+crypto-dev-signer~=0.4.14a5
+chainlib~=0.0.1a29