diff --git a/src/blackbox/workflow.py b/src/blackbox/workflow.py
index 98cc33d..e0cdc68 100644
--- a/src/blackbox/workflow.py
+++ b/src/blackbox/workflow.py
@@ -49,7 +49,7 @@ class Workflow(Blackbox):
         return Literal(self.sum_blackbox.processing(*args, **kwargs))
     
     async def processing(self, *args, **kwargs):
-        request = args[0]
+        request: Request = args[0]
         json = await request.json()
         content = None
         mdeia_type = None