diff --git a/src/mastodon/model/media.py b/src/mastodon/model/media.py
index f44da00..fa7fee0 100644
--- a/src/mastodon/model/media.py
+++ b/src/mastodon/model/media.py
@@ -21,7 +21,7 @@ class MediaAttachment(BaseModel):
     media_type: str = Field(alias="type")
     url: str
     preview_url: str
-    text_url: str
+    text_url: Optional[str]
     meta: Meta
     description: Optional[str]
     blurhash: str