diff --git a/resend/contacts/_contact.py b/resend/contacts/_contact.py
index 4089e43..83e6eeb 100644
--- a/resend/contacts/_contact.py
+++ b/resend/contacts/_contact.py
@@ -1,4 +1,4 @@
-from typing import Any, Dict
+from typing import Any, Dict, Optional
 
 from typing_extensions import NotRequired, TypedDict
 
@@ -12,13 +12,13 @@ class Contact(TypedDict):
     """
     The email of the contact.
     """
-    first_name: NotRequired[str]
+    first_name: Optional[str]
     """
-    The first name of the contact.
+    The first name of the contact. None when the contact has no first name.
     """
-    last_name: NotRequired[str]
+    last_name: Optional[str]
     """
-    The last name of the contact.
+    The last name of the contact. None when the contact has no last name.
     """
     created_at: str
     """
diff --git a/resend/webhooks/_webhook_event.py b/resend/webhooks/_webhook_event.py
index 42d66cf..34c8b1b 100644
--- a/resend/webhooks/_webhook_event.py
+++ b/resend/webhooks/_webhook_event.py
@@ -277,13 +277,13 @@ class ContactEventData(TypedDict):
     """
     Whether the contact is unsubscribed.
     """
-    first_name: NotRequired[str]
+    first_name: NotRequired[Optional[str]]
     """
-    The contact's first name.
+    The contact's first name. None when the contact has no first name.
     """
-    last_name: NotRequired[str]
+    last_name: NotRequired[Optional[str]]
     """
-    The contact's last name.
+    The contact's last name. None when the contact has no last name.
     """