diff --git a/bigchaindb/upsert_validator/validator_utils.py b/bigchaindb/upsert_validator/validator_utils.py
index cee814ac..98c3187f 100644
--- a/bigchaindb/upsert_validator/validator_utils.py
+++ b/bigchaindb/upsert_validator/validator_utils.py
@@ -3,7 +3,7 @@ import base64
 import binascii
 
 from github.com.tendermint.tendermint.abci.types.types_pb2 import (ValidatorUpdate,
-                            PubKey)
+                                                                   PubKey)
 from bigchaindb.common.exceptions import InvalidPublicKey