diff --git a/Sources/SwiftyProvisioningProfile/Model/ProvisioningProfile.swift b/Sources/SwiftyProvisioningProfile/Model/ProvisioningProfile.swift
index 4305b2a..b23a661 100644
--- a/Sources/SwiftyProvisioningProfile/Model/ProvisioningProfile.swift
+++ b/Sources/SwiftyProvisioningProfile/Model/ProvisioningProfile.swift
@@ -41,7 +41,7 @@ public struct ProvisioningProfile: Codable {
     public var name: String
     
     /// An array of device UUIDs that are provisioned on this profile
-    public var provisionedDevices: [String]
+    public var provisionedDevices: [String]?
     
     /// An array of team identifier of which this profile belongs to
     public var teamIdentifiers: [String]