diff --git a/app/Http/Requests/ClientPortal/PrePayments/StorePrePaymentRequest.php b/app/Http/Requests/ClientPortal/PrePayments/StorePrePaymentRequest.php
index baa5e2a903f5..a1a4770cd6c9 100644
--- a/app/Http/Requests/ClientPortal/PrePayments/StorePrePaymentRequest.php
+++ b/app/Http/Requests/ClientPortal/PrePayments/StorePrePaymentRequest.php
@@ -26,7 +26,7 @@ class StorePrePaymentRequest extends FormRequest
     {
         return [
             'notes' => 'required|bail|',
-            'amount' => 'required|bail|gte:minimum_amount',
+            'amount' => 'required|bail|gte:minimum_amount|numeric',
             'minimum_amount' => '',
         ];
     }