diff --git a/app/Http/Requests/CreatePaymentAPIRequest.php b/app/Http/Requests/CreatePaymentAPIRequest.php
index d00fbb44573b..226ab5366663 100644
--- a/app/Http/Requests/CreatePaymentAPIRequest.php
+++ b/app/Http/Requests/CreatePaymentAPIRequest.php
@@ -38,7 +38,7 @@ class CreatePaymentAPIRequest extends PaymentRequest
         ]);
 
         $rules = [
-            'amount' => "required|less_than:{$invoice->balance}|positive",
+            'amount' => "required|numeric|between:0.01,{$invoice->balance}",
         ];
 
         if ($this->payment_type_id == PAYMENT_TYPE_CREDIT) {
diff --git a/app/Http/Requests/CreatePaymentRequest.php b/app/Http/Requests/CreatePaymentRequest.php
index a6eda2d599e4..745f0afa3ba4 100644
--- a/app/Http/Requests/CreatePaymentRequest.php
+++ b/app/Http/Requests/CreatePaymentRequest.php
@@ -29,7 +29,7 @@ class CreatePaymentRequest extends PaymentRequest
         $rules = [
             'client' => 'required', // TODO: change to client_id once views are updated
             'invoice' => 'required', // TODO: change to invoice_id once views are updated
-            'amount' => "required|less_than:{$invoice->balance}|positive",
+            'amount' => "required|numeric|between:0.01,{$invoice->balance}",
             'payment_date' => 'required',
         ];
 
diff --git a/app/Providers/AppServiceProvider.php b/app/Providers/AppServiceProvider.php
index 203bc6c080ef..ceaa9e89ceb7 100644
--- a/app/Providers/AppServiceProvider.php
+++ b/app/Providers/AppServiceProvider.php
@@ -165,14 +165,6 @@ class AppServiceProvider extends ServiceProvider
             return true;
         });
 
-        Validator::extend('less_than', function($attribute, $value, $parameters) {
-            return floatval($value) <= floatval($parameters[0]);
-        });
-
-        Validator::replacer('less_than', function($message, $attribute, $rule, $parameters) {
-            return str_replace(':value', $parameters[0], $message);
-        });
-
         Validator::extend('has_counter', function($attribute, $value, $parameters) {
             return !$value || strstr($value, '{$counter}');
         });