diff --git a/src/Components/Event.php b/src/Components/Event.php
index 9387834..bf7a450 100644
--- a/src/Components/Event.php
+++ b/src/Components/Event.php
@@ -127,7 +127,14 @@ public function startsAt(DateTimeInterface $starts, bool $withTime = true): Even
 
     public function endsAt(DateTimeInterface $ends, bool $withTime = true): Event
     {
-        $this->ends = DateTimeValue::create($ends, $withTime);
+        if ($this->isFullDay) {
+            // The DTEND is the non-inclusive end of the event.
+            $ends = $ends->modify('+1 day');
+            $this->ends = DateTimeValue::create($ends, false);
+        } else {
+            $this->ends = DateTimeValue::create($ends, $withTime);
+        }
+
 
         return $this;
     }
diff --git a/tests/__snapshots__/IntegrationTest__it_can_create_a_full_day_event__1.txt b/tests/__snapshots__/IntegrationTest__it_can_create_a_full_day_event__1.txt
index 94fdbc0..cf086b4 100644
--- a/tests/__snapshots__/IntegrationTest__it_can_create_a_full_day_event__1.txt
+++ b/tests/__snapshots__/IntegrationTest__it_can_create_a_full_day_event__1.txt
@@ -8,6 +8,6 @@ UID:uuid_2
 DTSTAMP:20190306T150000Z
 SUMMARY:Laracon online
 DTSTART;VALUE=DATE:20190306
-DTEND;VALUE=DATE:20190306
+DTEND;VALUE=DATE:20190307
 END:VEVENT
 END:VCALENDAR
\ No newline at end of file