diff --git a/agent/component/begin.py b/agent/component/begin.py
index d65a698fa..159f0f5d7 100644
--- a/agent/component/begin.py
+++ b/agent/component/begin.py
@@ -39,7 +39,10 @@ class Begin(UserFillUp):
     def _invoke(self, **kwargs):
         for k, v in kwargs.get("inputs", {}).items():
             if isinstance(v, dict) and v.get("type", "").lower().find("file") >=0:
-                v = self._canvas.get_files([v["value"]])
+                if v.get("optional") and v.get("value", None) is None:
+                    v = None
+                else:
+                    v = self._canvas.get_files([v["value"]])
             else:
                 v = v.get("value")
             self.set_output(k, v)