diff --git a/src/App.php b/src/App.php
index 0b9e4a3..20814d8 100644
--- a/src/App.php
+++ b/src/App.php
@@ -51,7 +51,7 @@ class App
             ])),
             'log' => Expect::string()->assert(
                 function (string $path): bool {
-                    return is_writable($path);
+                    return touch($path);
                 }
             )->required(),
             'templates' => Expect::structure(['notify' => Expect::string()])