diff --git a/pybtc/connector.py b/pybtc/connector.py
index 03b1506..ecf1801 100644
--- a/pybtc/connector.py
+++ b/pybtc/connector.py
@@ -677,9 +677,9 @@ class Connector:
                     except:
                         pass
                 if processed_height < self.last_block_height:
-                    for i in range(processed_height, self.last_block_height):
+                    for i in range(processed_height, self.last_block_height - 1):
                         self.block_preload.remove(i)
-                    processed_height = self.last_block_height
+                    processed_height = self.last_block_height - 1
                 if self.block_preload._store_size < self.block_preload_cache_limit * 0.9:
                     continue