diff --git a/server/block_processor.py b/server/block_processor.py
index 60299ac..55a28f0 100644
--- a/server/block_processor.py
+++ b/server/block_processor.py
@@ -21,7 +21,6 @@ from functools import partial
 from server.daemon import Daemon, DaemonError
 from server.version import VERSION
 from lib.hash import hash_to_str
-from lib.tx import Deserializer
 from lib.util import chunks, LoggedClass
 import server.db
 from server.storage import open_db
diff --git a/server/protocol.py b/server/protocol.py
index 63460a2..6e1051e 100644
--- a/server/protocol.py
+++ b/server/protocol.py
@@ -14,11 +14,12 @@ import json
 import ssl
 import time
 import traceback
-from collections import namedtuple
+from collections import defaultdict, namedtuple
 from functools import partial
 
 from lib.hash import sha256, double_sha256, hash_to_str, hex_str_to_hash
 from lib.jsonrpc import JSONRPC, json_notification_payload
+from lib.tx import Deserializer
 from lib.util import LoggedClass
 from server.block_processor import BlockProcessor
 from server.daemon import DaemonError