diff --git a/appendices/README.md b/appendices/README.md
index 24d57fb..9668e92 100644
--- a/appendices/README.md
+++ b/appendices/README.md
@@ -688,7 +688,7 @@ Run on your MISP instance the following commands.
 2. Install required PHP packages:
     ```
     cd /var/www/MISP/app
-    sudo -u www-data composer require supervisorphp/supervisor:^4.0 \
+    sudo -u www-data composer require --with-all-dependencies supervisorphp/supervisor:^4.0 \
         guzzlehttp/guzzle \
         php-http/message  \
         lstrojny/fxmlrpc