diff --git a/scripts/change_url b/scripts/change_url
index 6506704..113b205 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -65,8 +65,6 @@ fi
 
 #=================================================
 # STANDARD MODIFICATIONS
-#=================================================
-
 #=================================================
 # MODIFY URL IN NGINX CONF
 #=================================================
diff --git a/scripts/install b/scripts/install
index 3ad95a7..0058f20 100755
--- a/scripts/install
+++ b/scripts/install
@@ -108,6 +108,10 @@ ynh_script_progression --message="Customizing couchdb config..." --weight=2
 # customize a bit the couch config
 ynh_add_config --template="../conf/couch_ynh.ini" --destination="$final_path/etc/local.d/couch_ynh.ini"
 
+chmod 750 "$final_path"
+chmod -R o-rwx "$final_path"
+chown -R $app:$app "$final_path"
+
 #=================================================
 # SETUP LOGROTATE
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index 139a1db..850782a 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -99,6 +99,10 @@ apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 8756C4F765C9AC3CB6B85D6
 ynh_install_extra_app_dependencies --repo="https://apache.bintray.com/couchdb-deb buster main" --package="couchdb"
 # ynh_install_extra_app_dependencies --repo="https://apache.bintray.com/couchdb-deb buster main" --package="couchdb" --key="https://apache.bintray.com/couchdb-deb/dists/buster/Release.gpg"
 
+chmod 750 "$final_path"
+chmod -R o-rwx "$final_path"
+chown -R $app:$app "$final_path"
+
 #=================================================
 # INTEGRATE SERVICE IN YUNOHOST
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index fc8e6aa..a3487bf 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -57,6 +57,8 @@ if ynh_legacy_permissions_exists; then
 	ynh_app_setting_delete --app=$app --key=is_public
 fi
 
+ynh_permission_url --permission="main" --url="/_utils/index.html" --add_url="/" --auth_header=false
+
 #=================================================
 # NGINX CONFIGURATION
 #=================================================
@@ -102,6 +104,10 @@ ynh_script_progression --message="Updating a configuration file..."
 
 ynh_add_config --template="../conf/couch_ynh.ini" --destination="$final_path/etc/local.d/couch_ynh.ini"
 
+chmod 750 "$final_path"
+chmod -R o-rwx "$final_path"
+chown -R $app:$app "$final_path"
+
 #=================================================
 # GENERIC FINALIZATION
 #=================================================