diff --git a/pybtc/connector/utxo.py b/pybtc/connector/utxo.py
index d0772a0..dc4eb39 100644
--- a/pybtc/connector/utxo.py
+++ b/pybtc/connector/utxo.py
@@ -54,7 +54,7 @@ class UTXO():
         if  not self.checkpoints: return
         self.save_process = True
         try:
-            self.log.critical("create checkpoint")
+            self.log.critical("create checkpoint " + str( self.checkpoints))
             i = self.cached.peek_last_item()
             self.checkpoints = sorted(self.checkpoints)
             checkpoint = self.checkpoints.pop(0)