diff --git a/README.md b/README.md
index 54bc5b5..467e99a 100644
--- a/README.md
+++ b/README.md
@@ -122,6 +122,12 @@ Be aware that a first up, since the db is empty, it will be populated with your
 
 ## Druapal Composer install
 Only at first up, finish to install drupal composer dependencies
+but first we need to downgrade composer to version 1
+```
+docker exec -u 0 -it enfrancais_api_1 /bin/bash
+composer selfupdate --1
+```
+ctrl+d
 ```
 make exec_api
 composer install