diff --git a/build/lib.macosx-10.9-x86_64-3.7/pybtc/connector.py b/build/lib.macosx-10.9-x86_64-3.7/pybtc/connector.py
index 839e852..94277cf 100644
--- a/build/lib.macosx-10.9-x86_64-3.7/pybtc/connector.py
+++ b/build/lib.macosx-10.9-x86_64-3.7/pybtc/connector.py
@@ -380,9 +380,9 @@ class Connector:
             self.last_block_height = block["height"]
             if self.utxo_data:
                 if not self.deep_synchronization:
-                    self.utxo.destroy_utxo(block["height"])
+                    self.utxo.destroy_utxo()
                 elif block["height"] % 500 == 0:
-                    self.utxo.destroy_utxo(block["height"])
+                    self.utxo.destroy_utxo()
 
             self.blocks_processed_count += 1
 
diff --git a/pybtc/connector/connector.py b/pybtc/connector/connector.py
index 2a09896..43b6b02 100644
--- a/pybtc/connector/connector.py
+++ b/pybtc/connector/connector.py
@@ -371,7 +371,7 @@ class Connector:
             self.block_headers_cache.set(block["hash"], block["height"])
             self.last_block_height = block["height"]
             if self.utxo_data:
-                self.utxo.destroy_utxo(block["height"])
+                self.utxo.destroy_utxo()
 
 
             self.blocks_processed_count += 1
diff --git a/pybtc/connector/utxo.py b/pybtc/connector/utxo.py
index afab71e..ad4f944 100644
--- a/pybtc/connector/utxo.py
+++ b/pybtc/connector/utxo.py
@@ -34,7 +34,7 @@ class UTXO():
         self.outs_total = 0
 
     def set(self, outpoint, pointer, amount, address):
-        self.cached[outpoint] = (pointer, amount, address)
+        self.cached[outpoint] = [pointer, amount, address]
         self.outs_total += 1
         if pointer:
             self.last_cached_block = pointer >> 42
@@ -42,7 +42,7 @@ class UTXO():
     def remove(self, outpoint):
         del self.cached[outpoint]
 
-    def destroy_utxo(self, block_height):
+    def destroy_utxo(self):
         while self.destroyed:
             outpoint = self.destroyed.pop()
             try: