diff --git a/src/RRule.php b/src/RRule.php
index 1723bfa..c5ef8bc 100644
--- a/src/RRule.php
+++ b/src/RRule.php
@@ -194,7 +194,7 @@ public function getStart(): ?DateTimeInterface
     }
 
     /**
-     * Set the end time of this frequency
+     * Set the time until this frequency lasts
      *
      * The given datetime will be cloned and microseconds removed since iCalendar datetimes only work to the second.
      *
@@ -207,7 +207,7 @@ public function endAt(DateTimeInterface $end): self
         $end = clone $end;
         $end->setTime($end->format('H'), $end->format('i'), $end->format('s'));
 
-        $this->rrule->setEndDate($end);
+        $this->rrule->setUntil($end);
 
         return $this;
     }
diff --git a/tests/RRuleTest.php b/tests/RRuleTest.php
index beeeebd..ad76d88 100644
--- a/tests/RRuleTest.php
+++ b/tests/RRuleTest.php
@@ -3,6 +3,7 @@
 namespace ipl\Tests\Scheduler;
 
 use DateTime;
+use DateTimeZone;
 use ipl\Scheduler\Contract\Frequency;
 use ipl\Scheduler\RRule;
 use PHPUnit\Framework\TestCase;
@@ -156,4 +157,20 @@ public function testJsonSerializeAndDeserialize()
 
         $this->assertEquals($rrule, RRule::fromJson(json_encode($rrule)));
     }
+
+    public function testRecurrenceEndIsProperlySet()
+    {
+        $rrule = RRule::fromFrequency(RRule::DAILY)
+            ->startAt(new DateTime('2023-01-01T12:00:00', new DateTimeZone('UTC')))
+            ->endAt(new DateTime('2024-01-01T12:00:00', new DateTimeZone('UTC')));
+
+        $this->assertSame(
+            [
+                'start'     => '2023-01-01T12:00:00+00:00',
+                'rrule'     => 'FREQ=DAILY;UNTIL=20240101T120000Z',
+                'frequency' => RRule::DAILY
+            ],
+            $rrule->jsonSerialize()
+        );
+    }
 }