diff --git a/models/Generation.py b/models/Generation.py
index 29e9717..98cceda 100644
--- a/models/Generation.py
+++ b/models/Generation.py
@@ -24,7 +24,7 @@ class Generation(BaseModel):
     quality: Quality
     prompt: str
     tech_prompt: Optional[str] = None
-    assets_list: List[str]
+    assets_list: List[str] = Field(default_factory=list)
     result_list: List[str] = Field(default_factory=list)
     result: Optional[str] = None
     progress: int = 0