diff --git a/src/SslCertificate.php b/src/SslCertificate.php
index d41fb84..9679660 100644
--- a/src/SslCertificate.php
+++ b/src/SslCertificate.php
@@ -216,9 +216,7 @@ public function daysUntilExpirationDate(): int
     {
         $endDate = $this->expirationDate();
 
-        $interval = Carbon::now()->diff($endDate);
-
-        return (int) $interval->format('%r%a');
+        return (int) Carbon::now()->diffInDays($endDate);
     }
 
     public function getDomains(): array