diff --git a/conf/.env b/conf/.env
index 5bb65b8..3be25ab 100644
--- a/conf/.env
+++ b/conf/.env
@@ -1,6 +1,6 @@
 TZ=__TIMEZONE__
 OCIS_URL=https://__DOMAIN__
-OCIS_PUBLIC_URL=https://__DOMAIN__
+#OCIS_PUBLIC_URL=https://__DOMAIN__
 PROXY_HTTP_ADDR=127.0.0.1:__PORT__
 PROXY_TLS=true
 OCIS_INSECURE=false
diff --git a/scripts/upgrade b/scripts/upgrade
index 900e77a..2cd3f72 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -20,6 +20,15 @@ ynh_script_progression --message="Stopping a systemd service..." --weight=1
 
 ynh_systemd_action --service_name=$app --action="stop" --log_path="systemd"
 
+#=================================================
+# ENSURE DOWNWARD COMPATIBILITY
+#=================================================
+ynh_script_progression --message="Ensuring downward compatibility..." --weight=1
+
+if [[ -f "$install_dir/ocis.yaml" ]]; then
+    mv "$install_dir/ocis.yaml" "$data_dir/config/ocis.yaml"
+fi
+
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
@@ -48,12 +57,12 @@ yunohost service add $app --description="File sharing platform" --log="/var/log/
 #=================================================
 # ADD A CONFIGURATION
 #=================================================
-#ynh_script_progression --message="Adding a configuration file..." --weight=1
+ynh_script_progression --message="Adding a configuration file..." --weight=1
 
-#ynh_add_config --template=".env" --destination="$install_dir/ocis.env"
+ynh_add_config --template=".env" --destination="$install_dir/ocis.env"
 
-#chmod 400 "$install_dir/ocis.env"
-#chown $app:$app "$install_dir/ocis.env"
+chmod 400 "$install_dir/ocis.env"
+chown $app:$app "$install_dir/ocis.env"
 
 #=================================================
 # START SYSTEMD SERVICE