diff --git a/version.inc.php b/version.inc.php
index ae4714e..6e89f2a 100644
--- a/version.inc.php
+++ b/version.inc.php
@@ -92,7 +92,7 @@ function get_inc_game_version()
 
 function get_version_file_lifetime()
 {
-  exec("git log --follow --format=%ad --date=format:'%Y-%m-%d %H:%M:%S' " . get_path_to_version_file() , $out, $ret);
+  exec("git log --follow --format=%ad --date=format:\"%Y-%m-%d %H:%M:%S\" " . get_path_to_version_file() , $out, $ret);
   if($ret != 0)
     throw new Exception("git error");
   $minutes = (time() - strtotime($out[0])) / 60;