diff --git a/lib/MediaPath.php b/lib/MediaPath.php
index 1d5b37e..5c29301 100644
--- a/lib/MediaPath.php
+++ b/lib/MediaPath.php
@@ -89,8 +89,10 @@ class MediaPath
     {
         $return = collect([]);
 
+        $extensionRegex = $this->compressor()->getExtensionRegex();
+
         foreach (Storage::files($this->versionsDirPath()) as $file) {
-            if (!preg_match_all('|('.preg_quote($this->filename(), '|').')(-[0-9]+x[0-9]+)?(\.'.$this->compressor()->getExtensionRegex().'+)$|', $file, $matches)) {
+            if (!preg_match_all('|('.preg_quote($this->filename(), '|').')(-[0-9]+x[0-9]+)?(\.'.$extensionRegex.'+)$|', $file, $matches)) {
                 continue;
             }