diff --git a/api/core/plugin/entities/plugin.py b/api/core/plugin/entities/plugin.py
index 55f7eff882..c15f98c6ea 100644
--- a/api/core/plugin/entities/plugin.py
+++ b/api/core/plugin/entities/plugin.py
@@ -84,7 +84,7 @@ class PluginDeclaration(BaseModel):
     resource: PluginResourceRequirements
     plugins: Plugins
     tags: list[str] = Field(default_factory=list)
-    repo: Optional[str] = None
+    repo: Optional[str] = Field(default=None)
     verified: bool = Field(default=False)
     tool: Optional[ToolProviderEntity] = None
     model: Optional[ProviderEntity] = None