diff --git a/setra_client/models.py b/setra_client/models.py
index 4f32b6583c94b5bfa0a3f0d9fac3b99a7b173783..343285aba1fb2fc4bfd2e34116d2aaaa902b4ccd 100644
--- a/setra_client/models.py
+++ b/setra_client/models.py
@@ -27,7 +27,7 @@ class BaseModel(pydantic.BaseModel):
         return cls.from_dict(data)
 
 
-class BatchProgressEnum(Enum):
+class BatchProgressEnum(str, Enum):
     CREATED = 'created'
     VALIDATION_COMPLETED = 'validation_completed'
     VALIDATION_FAILED = 'validation_failed'