diff --git a/Sources/Models/WebCallResponse.swift b/Sources/Models/WebCallResponse.swift
index 763635d..50735aa 100644
--- a/Sources/Models/WebCallResponse.swift
+++ b/Sources/Models/WebCallResponse.swift
@@ -8,7 +8,14 @@
 import Foundation
 
 public struct ArtifactPlan: Decodable {
-    public let videoRecordingEnabled: Bool
+    // Optional because the Vapi server response no longer always
+    // includes this field under `artifactPlan` — it moved into
+    // `transport.videoRecordingEnabled`. Making it `Bool?` keeps
+    // the SDK's strict decoder from throwing `keyNotFound` on a
+    // missing key, which previously caused every `vapi.start()`
+    // call to fail immediately with an `.callDidEnd` event and
+    // no transcript.
+    public let videoRecordingEnabled: Bool?
 }
 
 public struct WebCallResponse: Decodable {