diff --git a/CHANGELOG.md b/CHANGELOG.md
index 633bdeb2..6a8827f2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## Next Release
+
+- Adds support for `UspsShipAccount`
+
 ## v8.2.0 (2025-06-18)
 
 - Adds the following functions
diff --git a/lib/EasyPost/Constant/Constants.php b/lib/EasyPost/Constant/Constants.php
index aae196d6..16119a19 100644
--- a/lib/EasyPost/Constant/Constants.php
+++ b/lib/EasyPost/Constant/Constants.php
@@ -24,7 +24,8 @@ abstract class Constants
         'AmazonShippingAccount',
         'UpsAccount',
         'UpsMailInnovationsAccount',
-        'UpsSurepostAccount'
+        'UpsSurepostAccount',
+        'UspsShipAccount',
     ];
 
     // Exception messages (many of these are intended to be used with `sprintf()`)