diff --git a/resend.go b/resend.go
index 5593495..835f847 100644
--- a/resend.go
+++ b/resend.go
@@ -12,7 +12,7 @@ import (
 )
 
 const (
-	version     = "2.12.0"
+	version     = "2.13.0"
 	userAgent   = "resend-go/" + version
 	contentType = "application/json"
 )