diff --git a/config.php b/config.php
index dd6613d..f8f0903 100644
--- a/config.php
+++ b/config.php
@@ -261,6 +261,12 @@ class config
         $new = substr ($values, 1, -1);
       elseif (strpos ($values, "."))
         $new = floatval ($values);
+      elseif ($values === "null")
+        $new = null;
+      elseif ($values === "false")
+        $new = false;
+      elseif ($values === "true")
+        $new = true;
       else
         $new = intval ($values);
     }