diff --git a/mailtmapi/schemas/message.py b/mailtmapi/schemas/message.py
index 1f7508b..0bf23f4 100644
--- a/mailtmapi/schemas/message.py
+++ b/mailtmapi/schemas/message.py
@@ -64,7 +64,7 @@ class OneMessage(BaseModel):
     text: str
     html: list[str]
     hasAttachments: bool
-    attachments: list[Attachment] = None
+    attachments: any = None
     size: int
     downloadUrl: str
     createdAt: str