diff --git a/api/core/workflow/nodes/variable_aggregator/entities.py b/api/core/workflow/nodes/variable_aggregator/entities.py
index cea88334b9..e5de38dc0f 100644
--- a/api/core/workflow/nodes/variable_aggregator/entities.py
+++ b/api/core/workflow/nodes/variable_aggregator/entities.py
@@ -17,7 +17,7 @@ class AdvancedSettings(BaseModel):
         """
         Group.
         """
-        output_type: Literal['string', 'number', 'array', 'object']
+        output_type: Literal['string', 'number', 'object', 'array[string]', 'array[number]', 'array[object]']
         variables: list[list[str]]
         group_name: str
 
@@ -30,4 +30,4 @@ class VariableAssignerNodeData(BaseNodeData):
     type: str = 'variable-assigner'
     output_type: str
     variables: list[list[str]]
-    advanced_settings: Optional[AdvancedSettings] = None
\ No newline at end of file
+    advanced_settings: Optional[AdvancedSettings] = None