diff --git a/src/Notifications/Notifications/CertificateExpiresSoon.php b/src/Notifications/Notifications/CertificateExpiresSoon.php
index f99eb91f..f13d3ed1 100644
--- a/src/Notifications/Notifications/CertificateExpiresSoon.php
+++ b/src/Notifications/Notifications/CertificateExpiresSoon.php
@@ -57,6 +57,6 @@ public function setEvent(SoonExpiringSslCertificateFoundEvent $event)
 
     protected function getMessageText(): string
     {
-        return "SSL certificate for {$this->event->monitor->url} expires soon";
+        return "SSL certificate for {$this->getMonitor()->url} expires soon";
     }
 }
diff --git a/src/Notifications/Notifications/UptimeCheckFailed.php b/src/Notifications/Notifications/UptimeCheckFailed.php
index 7743da7c..af43a794 100644
--- a/src/Notifications/Notifications/UptimeCheckFailed.php
+++ b/src/Notifications/Notifications/UptimeCheckFailed.php
@@ -57,7 +57,7 @@ public function getMonitorProperties($extraProperties = []): array
 
         $extraProperties = [
             $since => $date,
-            'Failure reason' => $this->event->monitor->uptime_check_failure_reason,
+            'Failure reason' => $this->getMonitor()->uptime_check_failure_reason,
         ];
 
         return parent::getMonitorProperties($extraProperties);
@@ -65,7 +65,7 @@ public function getMonitorProperties($extraProperties = []): array
 
     public function isStillRelevant(): bool
     {
-        return $this->event->monitor->uptime_status == UptimeStatus::DOWN;
+        return $this->getMonitor()->uptime_status == UptimeStatus::DOWN;
     }
 
     public function setEvent(MonitorFailedEvent $event)
@@ -77,6 +77,6 @@ public function setEvent(MonitorFailedEvent $event)
 
     protected function getMessageText(): string
     {
-        return "{$this->event->monitor->url} seems down";
+        return "{$this->getMonitor()->url} seems down";
     }
 }
diff --git a/src/Notifications/Notifications/UptimeCheckRecovered.php b/src/Notifications/Notifications/UptimeCheckRecovered.php
index 4d1b7eab..988d8f3d 100644
--- a/src/Notifications/Notifications/UptimeCheckRecovered.php
+++ b/src/Notifications/Notifications/UptimeCheckRecovered.php
@@ -60,7 +60,7 @@ public function getMonitorProperties($extraProperties = []): array
 
     public function isStillRelevant(): bool
     {
-        return $this->event->monitor->uptime_status == UptimeStatus::UP;
+        return $this->getMonitor()->uptime_status == UptimeStatus::UP;
     }
 
     public function setEvent(MonitorRecoveredEvent $event)
@@ -72,6 +72,6 @@ public function setEvent(MonitorRecoveredEvent $event)
 
     public function getMessageText(): string
     {
-        return "{$this->event->monitor->url} has recovered after {$this->event->downtimePeriod->duration()}";
+        return "{$this->getMonitor()->url} has recovered after {$this->event->downtimePeriod->duration()}";
     }
 }
diff --git a/src/Notifications/Notifications/UptimeCheckSucceeded.php b/src/Notifications/Notifications/UptimeCheckSucceeded.php
index b36b479b..6802da11 100644
--- a/src/Notifications/Notifications/UptimeCheckSucceeded.php
+++ b/src/Notifications/Notifications/UptimeCheckSucceeded.php
@@ -49,7 +49,7 @@ public function toSlack($notifiable)
 
     public function isStillRelevant(): bool
     {
-        return $this->event->monitor->uptime_status != UptimeStatus::DOWN;
+        return $this->getMonitor()->uptime_status != UptimeStatus::DOWN;
     }
 
     public function setEvent(MonitorSucceededEvent $event)
@@ -61,6 +61,6 @@ public function setEvent(MonitorSucceededEvent $event)
 
     public function getMessageText(): string
     {
-        return "{$this->event->monitor->url} is up";
+        return "{$this->getMonitor()->url} is up";
     }
 }