diff --git a/etc/events.xml b/etc/events.xml
index 577cf5b..2c74425 100644
--- a/etc/events.xml
+++ b/etc/events.xml
@@ -4,7 +4,7 @@
     <event name="payment_method_is_active">
         <observer name="disable_payment" instance="Bitpay\BPCheckout\Observer\BPPaymentMethodAvailable"/>
     </event>
-    <event name='sales_order_payment_refund'>
+    <event name="sales_order_payment_refund">
         <observer name="bitpay_payment_refund" instance='Bitpay\BPCheckout\Observer\BitPayPaymentRefund' />
     </event>
     <event name="sales_order_place_after">