diff --git a/Modules.md b/Modules.md
index 5d05a12..ef106ad 100644
--- a/Modules.md
+++ b/Modules.md
@@ -53,6 +53,8 @@ wget https://gitlab.com/Daniel-KM/Omeka-S-module-IiifServer/-/archive/3.5.16.1/O
 tar zxvf Omeka-S-module-IiifServer-3.5.16.1.tar.gz
 rm Omeka-S-module-IiifServer-3.5.16.1.tar.gz
 mv Omeka-S-module-IiifServer-3.5.16.1/ IiifServer
+chmod -R www-data.www-data IiifServer
+cd IiifServer
 composer install
 ```
 Now you can activate the module from the Omeka admin dashboard