diff --git a/pybtc/connector/connector.py b/pybtc/connector/connector.py
index f0ec294..c7ba628 100644
--- a/pybtc/connector/connector.py
+++ b/pybtc/connector/connector.py
@@ -12,8 +12,7 @@ import zmq
 import zmq.asyncio
 import asyncio
 import time
-from _pickle import loads, dumps
-from collections import OrderedDict, deque
+from _pickle import loads
 
 class Connector:
     def __init__(self, node_rpc_url, node_zerromq_url, logger,
diff --git a/pybtc/connector/utxo.py b/pybtc/connector/utxo.py
index b5f7282..0d17c4a 100644
--- a/pybtc/connector/utxo.py
+++ b/pybtc/connector/utxo.py
@@ -55,14 +55,14 @@ class UTXO():
             checkpoint_found = False
             utxo = set()
             while self.cached:
-                i = self.cached.popleft()
+                i = self.cached.pop()
                 if lb != i[1][0] >> 42:
                     block_changed = True
                     lb = i[1][0] >> 42
                 if lb - 1 == checkpoint:
                     if len(self.cached) > self.size_limit:
                         if self.checkpoints:
-                            checkpoint = self.checkpoints.pop()
+                            checkpoint = self.checkpoints.popleft()
                     else:
                         checkpoint_found = True