diff --git a/src/SnapshotRepository.php b/src/SnapshotRepository.php
index ef06d41..232e9a0 100644
--- a/src/SnapshotRepository.php
+++ b/src/SnapshotRepository.php
@@ -19,7 +19,7 @@ public function getAll(): Collection
             ->filter(function (string $fileName) {
                 $pathinfo = pathinfo($fileName);
 
-                if ($pathinfo['extension'] === 'gz') {
+                if (($pathinfo['extension'] ?? null) === 'gz') {
                     $fileName = $pathinfo['filename'];
                 }