diff --git a/VERSION.md b/VERSION.md
index af6ef8b..a20ae58 100644
--- a/VERSION.md
+++ b/VERSION.md
@@ -1,11 +1,13 @@
+4.8.1
+
+## Fixed
+- Serialize query parameters with the encoding the API documents and the other official SDKs send: lists repeat the key (`status=valid&status=canceled`) instead of using indexes, and `null` values are omitted instead of being sent empty. Associative arrays (`date[gte]=...`) and explicit empty strings (`q=`) keep working.
+
 4.8.0
 
 ## Added
 - Add `invoices.paymentSummary()` to get the related-document object needed to build a payment complement (complemento de pago): installment number, previous balance, and taxes prorated to the paid amount.
 
-## Fixed
-- Serialize query parameters with the encoding the API documents and the other official SDKs send: lists repeat the key (`status=valid&status=canceled`) instead of using indexes, and `null` values are omitted instead of being sent empty. Associative arrays (`date[gte]=...`) and explicit empty strings (`q=`) keep working.
-
 4.7.1
 
 ## Fixed