diff --git a/api/core/workflow/nodes/tool/entities.py b/api/core/workflow/nodes/tool/entities.py
index 4f47fb1efc..c1cfbb1edc 100644
--- a/api/core/workflow/nodes/tool/entities.py
+++ b/api/core/workflow/nodes/tool/entities.py
@@ -55,7 +55,7 @@ class ToolNodeData(BaseNodeData, ToolEntity):
                     if not isinstance(val, str):
                         raise ValueError("value must be a list of strings")
             elif typ == "constant" and not isinstance(value, str | int | float | bool | dict):
-                raise ValueError("value must be a string, int, float, or bool")
+                raise ValueError("value must be a string, int, float, bool or dict")
             return typ
 
     tool_parameters: dict[str, ToolInput]