diff --git a/app/Models/Payment.php b/app/Models/Payment.php
index 5488269dc281..fe4a6cf92de5 100644
--- a/app/Models/Payment.php
+++ b/app/Models/Payment.php
@@ -67,6 +67,7 @@ class Payment extends BaseModel
     ];
 
     protected $casts = [
+        'exchange_rate' => 'float',
         'settings' => 'object',
         'updated_at' => 'timestamp',
         'created_at' => 'timestamp',