diff --git a/lib/Tracking_USPS.lib.php b/lib/Tracking_USPS.lib.php
index 9d8344c..6efacad 100644
--- a/lib/Tracking_USPS.lib.php
+++ b/lib/Tracking_USPS.lib.php
@@ -8,7 +8,10 @@ class Tracking_USPS {
      */
     public const STATELESS_CITIES = [
         "LOS ANGELES" => "CA",
-        "NEW YORK" => "NY"
+        "SAN FRANCISCO" => "CA",
+        "NEW YORK" => "NY",
+        "CHICAGO" => "IL",
+        "MIAMI" => "FL"
     ];
 
     /**