diff --git a/src/Controller/APIController.php b/src/Controller/APIController.php
index ebed3179..93bffd5d 100644
--- a/src/Controller/APIController.php
+++ b/src/Controller/APIController.php
@@ -1161,7 +1161,7 @@ class APIController extends Controller implements LoggedController
         // make invoice json data
         $invoice_data = [
             'total_price' => $invoice->getTotalPrice(),
-            'vat_ex_price' => $invoice->getVATExclusivePrice(),
+            'vat_ex_price' => (float) $invoice->getVATExclusivePrice(),
             'vat' => $invoice->getVAT(),
             'discount' => $invoice->getDiscount(),
             'trade_in' => $invoice->getTradeIn(),
@@ -3087,7 +3087,7 @@ class APIController extends Controller implements LoggedController
         // make invoice json data
         $invoice_data = [
             'total_price' => $invoice->getTotalPrice(),
-            'vat_ex_price' => $invoice->getVATExclusivePrice(),
+            'vat_ex_price' => (float) $invoice->getVATExclusivePrice(),
             'vat' => $invoice->getVAT(),
             'discount' => $invoice->getDiscount(),
             'trade_in' => $invoice->getTradeIn(),