diff --git a/blockchain.py b/blockchain.py
index 92576bf..0b41aa9 100644
--- a/blockchain.py
+++ b/blockchain.py
@@ -138,7 +138,7 @@ class Blockchain:
         return self.last_block['index'] + 1
 
     @property
-    def last_block(self) -> Dict[str, Any]:
+    def last_block(self):
         return self.chain[-1]
 
     @staticmethod