diff --git a/app/Imports/Banking/Transfers.php b/app/Imports/Banking/Transfers.php
index 9c0023df8..6943eff92 100644
--- a/app/Imports/Banking/Transfers.php
+++ b/app/Imports/Banking/Transfers.php
@@ -41,10 +41,10 @@ class Transfers extends Import
         return [
             'from_account_id' => 'required|integer',
             'from_currency_code' => 'required|string|currency',
-            'from_currency_rate' => 'required',
+            'from_currency_rate' => 'required|gt:0',
             'to_account_id' => 'required|integer',
             'to_currency_code' => 'required|string|currency',
-            'to_currency_rate' => 'required',
+            'to_currency_rate' => 'required|gt:0',
             'amount' => 'required|amount',
             'transferred_at' => 'required|date_format:Y-m-d',
             'payment_method' => 'required|string',
diff --git a/app/Imports/Purchases/Sheets/Bills.php b/app/Imports/Purchases/Sheets/Bills.php
index a1b3cac99..8a6c7206b 100644
--- a/app/Imports/Purchases/Sheets/Bills.php
+++ b/app/Imports/Purchases/Sheets/Bills.php
@@ -43,7 +43,7 @@ class Bills extends Import
     {
         $rules['bill_number'] = Str::replaceFirst('unique:documents,NULL', 'unique:documents,document_number', $rules['document_number']);
         $rules['billed_at'] = $rules['issued_at'];
-        $rules['currency_rate'] = 'required';
+        $rules['currency_rate'] = 'required|gt:0';
 
         unset($rules['document_number'], $rules['issued_at'], $rules['type']);
 
diff --git a/app/Imports/Sales/Sheets/Invoices.php b/app/Imports/Sales/Sheets/Invoices.php
index 440d84d48..aeb831de8 100644
--- a/app/Imports/Sales/Sheets/Invoices.php
+++ b/app/Imports/Sales/Sheets/Invoices.php
@@ -43,7 +43,7 @@ class Invoices extends Import
     {
         $rules['invoice_number'] = Str::replaceFirst('unique:documents,NULL', 'unique:documents,document_number', $rules['document_number']);
         $rules['invoiced_at'] = $rules['issued_at'];
-        $rules['currency_rate'] = 'required';
+        $rules['currency_rate'] = 'required|gt:0';
 
         unset($rules['document_number'], $rules['issued_at'], $rules['type']);