diff --git a/resources/views/invoices/edit.blade.php b/resources/views/invoices/edit.blade.php
index 595fd120a8b3..4238c79c76ae 100644
--- a/resources/views/invoices/edit.blade.php
+++ b/resources/views/invoices/edit.blade.php
@@ -1268,7 +1268,7 @@
 		if (!design) return;
 		var doc = generatePDF(invoice, design, true);
         var type = invoice.is_quote ? {!! json_encode(trans('texts.'.ENTITY_QUOTE)) !!} : {!! json_encode(trans('texts.'.ENTITY_INVOICE)) !!};
-		doc.save(type + '-' + $('#invoice_number').val() + '.pdf');
+		doc.save(type + '_' + $('#invoice_number').val() + '.pdf');
 	}
 
     function onRecurrClick() {
diff --git a/resources/views/invoices/view.blade.php b/resources/views/invoices/view.blade.php
index 38ef0a04bb9a..c0bbc18c57cd 100644
--- a/resources/views/invoices/view.blade.php
+++ b/resources/views/invoices/view.blade.php
@@ -324,7 +324,7 @@
 				try {
 					var doc = generatePDF(invoice, invoice.invoice_design.javascript, true);
 	                var fileName = invoice.is_quote ? invoiceLabels.quote : invoiceLabels.invoice;
-					doc.save(fileName + '-' + invoice.invoice_number + '.pdf');
+					doc.save(fileName + '_' + invoice.invoice_number + '.pdf');
 			    } catch (exception) {
 					if (location.href.indexOf('/view/') > 0) {
 			            location.href = location.href.replace('/view/', '/download/');