diff --git a/tests/test_user_management.py b/tests/test_user_management.py
index 4a0eb6cb..f0aed6e9 100644
--- a/tests/test_user_management.py
+++ b/tests/test_user_management.py
@@ -390,6 +390,7 @@ def test_get_user(self, mock_user, capture_and_mock_http_client_request):
         assert request_kwargs["method"] == "get"
         assert user.id == "user_01H7ZGXFP5C6BBQY6Z7277ZCT0"
         assert user.profile_picture_url == "https://example.com/profile-picture.jpg"
+        assert user.last_sign_in_at == "2021-06-25T19:07:33.155Z"
 
     def test_list_users_auto_pagination(
         self,
diff --git a/tests/utils/fixtures/mock_user.py b/tests/utils/fixtures/mock_user.py
index 6f1349de..6a12710c 100644
--- a/tests/utils/fixtures/mock_user.py
+++ b/tests/utils/fixtures/mock_user.py
@@ -14,6 +14,7 @@ def __init__(self, id):
             last_name="Hoeger",
             email_verified=False,
             profile_picture_url="https://example.com/profile-picture.jpg",
+            last_sign_in_at="2021-06-25T19:07:33.155Z",
             created_at=now,
             updated_at=now,
         )
diff --git a/workos/types/user_management/user.py b/workos/types/user_management/user.py
index 6de89808..ca1e4c1b 100644
--- a/workos/types/user_management/user.py
+++ b/workos/types/user_management/user.py
@@ -12,5 +12,6 @@ class User(WorkOSModel):
     last_name: Optional[str] = None
     email_verified: bool
     profile_picture_url: Optional[str] = None
+    last_sign_in_at: Optional[str] = None
     created_at: str
     updated_at: str