diff --git a/functions.php b/functions.php
index 1f45cc1..9d54f38 100644
--- a/functions.php
+++ b/functions.php
@@ -73,9 +73,9 @@ function makeThumb($item = "") {
       $didwrite = file_put_contents($outfile, $imgdata);
       if ( !$didwrite ) return false;
    } elseif ( substr($comic, -3) == "cbr" ) {
-      $rar_file = rar_open($comic);
+      $rar_file = RarArchive::open($comic);
       if ( $rar_file === false ) { return false; }
-      $entries = rar_list($rar_file);
+      $entries = $rar_file->getEntries();
       $lowest = "~";
       foreach ( $entries as $entry ) {
          $imgname = $entry->getName();
@@ -89,7 +89,7 @@ function makeThumb($item = "") {
             }
          }
       }
-      rar_close($rar_file);
+      $rar_file->close();
    } else {
       return false;
    }