diff --git a/scripts/upgrade b/scripts/upgrade
index c17e2fa..3c430b8 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -64,8 +64,8 @@ then
   ynh_secure_remove --file="$tmpdir"
 fi
 
-chmod -R o-rwx "$install_dir"
 chown -R $app:www-data "$install_dir"
+chmod -R 750 "$install_dir"
 
 #=================================================
 # REAPPLY SYSTEM CONFIGURATIONS