diff --git a/git.inc.php b/git.inc.php
index 8c2d4fa..7d20cb6 100644
--- a/git.inc.php
+++ b/git.inc.php
@@ -44,7 +44,7 @@ function git_rev_from_commit_message(string $message) : string
   return $commit_hash;
 }
 
-function get_git_last_remote_tag(string $repo) : string|bool
+function get_git_last_remote_tag(string $repo) : mixed
 {
   $remote_tags = [];
   git_do($repo, 'ls-remote --tags origin', $output, false);