diff --git a/pybtc/connector/block_loader.py b/pybtc/connector/block_loader.py
index 5bc3ed8..2c8acf8 100644
--- a/pybtc/connector/block_loader.py
+++ b/pybtc/connector/block_loader.py
@@ -72,7 +72,7 @@ class BlockLoader:
                     if self.last_batch_size < 8000000:
                         self.rpc_batch_limit += 10
                     elif self.last_batch_size >  50000000 and self.rpc_batch_limit > 10:
-                        self.rpc_batch_limit = 50
+                        self.rpc_batch_limit = 40
                     if self.last_batch_size > 400:
                         self.last_batch_size = 400
                     for i in self.worker_busy:
@@ -186,7 +186,7 @@ class BlockLoader:
                     self.last_batch_size = len(msg)
                 for i in blocks:
                     self.parent.block_preload.set(i, blocks[i])
-                if blocks and index == len(self.worker_busy) - 1:
+                if blocks:
                     self.parent.utxo.checkpoints.append(i)
 
 
diff --git a/pybtc/connector/utxo.py b/pybtc/connector/utxo.py
index 36b6972..d0772a0 100644
--- a/pybtc/connector/utxo.py
+++ b/pybtc/connector/utxo.py
@@ -54,6 +54,7 @@ class UTXO():
         if  not self.checkpoints: return
         self.save_process = True
         try:
+            self.log.critical("create checkpoint")
             i = self.cached.peek_last_item()
             self.checkpoints = sorted(self.checkpoints)
             checkpoint = self.checkpoints.pop(0)