diff --git a/.DS_Store b/.DS_Store
index 5d5bb24..99541fa 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/src/Customer/Contact.ts b/src/Customer/Contact.ts
index 8716046..9175799 100644
--- a/src/Customer/Contact.ts
+++ b/src/Customer/Contact.ts
@@ -17,7 +17,7 @@ export default class Contact extends Resource {
   public email!: string;
 
   @Expose()
-  public cell_phone_number!: string;
+  public cell_phone_number?: string | null = null;
 
   @Expose()
   public phone_number?: string | null = null;