diff --git a/python/eth_contract_registry/interface.py b/python/eth_contract_registry/interface.py
index 22ff4af..2f161c3 100644
--- a/python/eth_contract_registry/interface.py
+++ b/python/eth_contract_registry/interface.py
@@ -1,3 +1,4 @@
+# standard imports
 import logging
 
 # external imports
diff --git a/python/requirements.txt b/python/requirements.txt
index 2f0f39f..5775cf3 100644
--- a/python/requirements.txt
+++ b/python/requirements.txt
@@ -1,3 +1,2 @@
 confini>=0.3.6rc3,<0.5.0
-crypto-dev-signer>=0.4.15a1,<=0.4.15
 chainlib-eth>=0.0.9a3,<=0.1.0