diff --git a/docs/walkthrough.md b/docs/walkthrough.md
index 0e9e022..92fc129 100644
--- a/docs/walkthrough.md
+++ b/docs/walkthrough.md
@@ -66,6 +66,7 @@ flowchart TB
         FS2["Download URL"]
         
         S4 -.->|Large Payload| FS1
+        FS1 -.->|URL| S5
         R3 -.->|Fetch URL| FS2
     end