diff --git a/tiddl/core/api/models/resources.py b/tiddl/core/api/models/resources.py
index 7c11666..5d718ad 100644
--- a/tiddl/core/api/models/resources.py
+++ b/tiddl/core/api/models/resources.py
@@ -124,7 +124,7 @@ class Album(BaseModel):
     numberOfVolumes: int
     releaseDate: datetime
     copyright: Optional[str] = None
-    type: str
+    type: Literal["ALBUM", "SINGLE", "EP"]
     version: Optional[str] = None
     url: str
     cover: Optional[str] = None