diff --git a/src/Service/FeedService.php b/src/Service/FeedService.php
index 44d4338..282c33b 100644
--- a/src/Service/FeedService.php
+++ b/src/Service/FeedService.php
@@ -98,7 +98,7 @@ class FeedService
     }
 
     /** Use FFProbe to get the media duration, probably the easiest way but requires a working FFMpeg install. */
-    protected static function getFileDuration(string $filepath): string
+    protected function getFileDuration(string $filepath): string
     {
         $ffprobeConfig = [];
         if ($this->ffprobePath) {