diff --git a/src/crewai/memory/entity/entity_memory.py b/src/crewai/memory/entity/entity_memory.py
index bba6a6774..1eecc237a 100644
--- a/src/crewai/memory/entity/entity_memory.py
+++ b/src/crewai/memory/entity/entity_memory.py
@@ -65,8 +65,8 @@ class EntityMemory(Memory):
     def save(
         self,
         value: Any,
-        metadata: Dict[str, Any] = None,
-        agent: str = None,
+        metadata: Optional[Dict[str, Any]] = None,
+        agent: Optional[str] = None,
     ) -> None:
         """Saves an entity item or value into the storage."""
         if isinstance(value, EntityMemoryItem):
diff --git a/src/crewai/memory/long_term/long_term_memory.py b/src/crewai/memory/long_term/long_term_memory.py
index 3a68b83b7..d5fb274b8 100644
--- a/src/crewai/memory/long_term/long_term_memory.py
+++ b/src/crewai/memory/long_term/long_term_memory.py
@@ -54,8 +54,8 @@ class LongTermMemory(Memory):
     def save(
         self,
         value: Any,
-        metadata: Dict[str, Any] = None,
-        agent: str = None,
+        metadata: Optional[Dict[str, Any]] = None,
+        agent: Optional[str] = None,
     ) -> None:
         """Saves a value into the memory."""
         if isinstance(value, LongTermMemoryItem):