diff --git a/uninstall.php b/uninstall.php
index 5f8bdeb..86e35bf 100644
--- a/uninstall.php
+++ b/uninstall.php
@@ -18,3 +18,4 @@ if (null !== $signature) {
         $sig_file->delete();
     }
 }
+unset($_SESSION['sig_file']);