diff --git a/Sources/PayrailsCSE/PayrailsCSE.swift b/Sources/PayrailsCSE/PayrailsCSE.swift
index 434e860..cc61bec 100644
--- a/Sources/PayrailsCSE/PayrailsCSE.swift
+++ b/Sources/PayrailsCSE/PayrailsCSE.swift
@@ -210,7 +210,7 @@ struct CSEConfiguration: Codable {
 
 struct VaultConfiguration: Codable {
     let encryptionPublicKey: String
-    let providerConfigId: String
+    let providerConfigId: String?
 }
 
 struct Tokenization: Codable {