diff --git a/src/cron/expression/expression.v b/src/cron/expression/expression.v
index 4873ffd..17d2dde 100644
--- a/src/cron/expression/expression.v
+++ b/src/cron/expression/expression.v
@@ -126,10 +126,10 @@ pub fn (ce &CronExpression) next_from_now() ?time.Time {
 pub fn (ce &CronExpression) next_n(ref time.Time, n int) ?[]time.Time {
 	mut times := []time.Time{cap: n}
 
-	times << ce.next(ref) ?
+	times << ce.next(ref)?
 
-	for i in 1..n {
-		times << ce.next(times[i - 1]) ?
+	for i in 1 .. n {
+		times << ce.next(times[i - 1])?
 	}
 
 	return times