diff --git a/README.md b/README.md
index fa9bbf5..7a39441 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Minimal groff web frontend
 ## Try it out
 
 Dependencies: `groff-base grap php-fpm`.
-Run the following command and visit http://0.0.0.0:8000 in your browser.
+Run the following command and visit http://0.0.0.0:8000 in your browser. (It will create a tmp directory!)
 
 ```shell
 wget -qO - "https://gitlab.com/tavo-wasd/groff-web/-/raw/main/public/index.php" | php -S 0.0.0.0:8000