diff --git a/monkey/infection_monkey/credential_collectors/i_credential_collector.py b/monkey/infection_monkey/credential_collectors/i_credential_collector.py
index 846cd26ec..847cd929d 100644
--- a/monkey/infection_monkey/credential_collectors/i_credential_collector.py
+++ b/monkey/infection_monkey/credential_collectors/i_credential_collector.py
@@ -1,10 +1,10 @@
 from abc import ABC, abstractmethod
-from typing import List, Mapping, Union
+from typing import Iterable, Mapping, Optional
 
 from .credentials import Credentials
 
 
 class ICredentialCollector(ABC):
     @abstractmethod
-    def collect_credentials(self, options: Union[Mapping, None]) -> List[Credentials]:
+    def collect_credentials(self, options: Optional[Mapping]) -> Iterable[Credentials]:
         pass