diff --git a/pyproject.toml b/pyproject.toml
index 5cdc0b1..1cc6570 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,7 +11,7 @@ authors = [
 	"Lars van Rhijn <l.vanrhijn@student.science.ru.nl>",
 ]
 maintainers = [
-	"Kees van Kempen <ru@keesvankempen.nl",
+	"Kees van Kempen <ru@keesvankempen.nl>",
 	"Lars van Rhijn <l.vanrhijn@student.science.ru.nl>",
 ]
 readme = "README.md"