diff --git a/BankTarget.py b/BankTarget.py
index d9a014a..315c499 100644
--- a/BankTarget.py
+++ b/BankTarget.py
@@ -6,6 +6,9 @@ class BankTarget(Target):
         self.is_hit = False
 
     def hit(self):
+        if self.is_hit:
+            return
+        
         self.is_hit = True
         super().hit()
         #notify Bank