diff --git a/scripts/upgrade b/scripts/upgrade
index dbd6c15..e0356b1 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -152,7 +152,7 @@ ynh_add_fpm_config --usage=low --footprint=low --package="$extra_php_dependencie
 ynh_script_progression --message="Installing Composer..." --weight=10
 
 # Install Composer
-ynh_install_composer
+ynh_install_composer --phpversion=$phpversion --workdir=$final_path --install_args="--prefer-source --no-dev"
 
 ynh_exec_warn_less ynh_composer_exec --commands=\"dump-autoload\"