diff --git a/src/Entity/CustomerVehicle.php b/src/Entity/CustomerVehicle.php
index aec185b1..01aff142 100644
--- a/src/Entity/CustomerVehicle.php
+++ b/src/Entity/CustomerVehicle.php
@@ -167,13 +167,16 @@ class CustomerVehicle
         // remove spaces
         $plate_number = str_replace(' ', '', $plate_number);
 
+        // upper case
+        $plate_number = strtoupper($plate_number);
+
         $this->plate_number = $plate_number;
         return $this;
     }
 
     public function getPlateNumber()
     {
-        return $this->plate_number;
+        return strtoupper($this->plate_number);
     }
 
     public function setModelYear($model_year)