diff --git a/Pachyderm/Model/Attachment.swift b/Pachyderm/Model/Attachment.swift
index f71a35fa..cc376dff 100644
--- a/Pachyderm/Model/Attachment.swift
+++ b/Pachyderm/Model/Attachment.swift
@@ -13,7 +13,7 @@ public class Attachment: Codable {
     public let kind: Kind
     public let url: URL
     public let remoteURL: URL?
-    public let previewURL: URL
+    public let previewURL: URL?
     public let textURL: URL?
     public let meta: Metadata?
     public let description: String?
@@ -30,11 +30,11 @@ public class Attachment: Codable {
         self.id = try container.decode(String.self, forKey: .id)
         self.kind = try container.decode(Kind.self, forKey: .kind)
         self.url = try container.decode(URL.self, forKey: .url)
-        self.previewURL = try container.decode(URL.self, forKey: .previewURL)
-        self.remoteURL = try? container.decode(URL.self, forKey: .remoteURL)
-        self.textURL = try? container.decode(URL.self, forKey: .textURL)
-        self.meta = try? container.decode(Metadata.self, forKey: .meta)
-        self.description = try? container.decode(String.self, forKey: .description)
+        self.previewURL = try? container.decode(URL?.self, forKey: .previewURL)
+        self.remoteURL = try? container.decode(URL?.self, forKey: .remoteURL)
+        self.textURL = try? container.decode(URL?.self, forKey: .textURL)
+        self.meta = try? container.decode(Metadata?.self, forKey: .meta)
+        self.description = try? container.decode(String?.self, forKey: .description)
     }
     
     private enum CodingKeys: String, CodingKey {