diff --git a/pybtc/connector/connector.py b/pybtc/connector/connector.py
index f70f528..458984b 100644
--- a/pybtc/connector/connector.py
+++ b/pybtc/connector/connector.py
@@ -377,10 +377,16 @@ class Connector:
                 if len(self.utxo.cached) > self.utxo.size_limit and \
                    not self.utxo.save_process and \
                    self.utxo.checkpoints:
-                    self.utxo.deleted_last_block = block["height"]
-                    self.utxo.pending_deleted = self.utxo.pending_deleted.union(self.utxo.deleted)
-                    self.utxo.deleted = set()
-                    self.loop.create_task(self.utxo.save_utxo())
+                    n = list()
+                    for i in self.utxo.checkpoints:
+                        if i >= block["height"]:
+                            n.append(i)
+                    self.utxo.checkpoints = n
+                    if n:
+                        self.utxo.deleted_last_block = block["height"]
+                        self.utxo.pending_deleted = self.utxo.pending_deleted.union(self.utxo.deleted)
+                        self.utxo.deleted = set()
+                        self.loop.create_task(self.utxo.save_utxo())
 
 
             self.blocks_processed_count += 1
diff --git a/pybtc/connector/utxo.py b/pybtc/connector/utxo.py
index a564cc2..59749b9 100644
--- a/pybtc/connector/utxo.py
+++ b/pybtc/connector/utxo.py
@@ -51,7 +51,8 @@ class UTXO():
         self.save_process = True
         try:
             # self.log.critical("cached " + str(len(self.cached)) )
-            # self.checkpoints = sorted(self.checkpoints)
+            i = self.cached.peek_last_item()
+            self.checkpoints = sorted(self.checkpoints)
             checkpoint = self.checkpoints.pop(0)
             lb = 0
             block_changed = False