diff --git a/scripts/upgrade b/scripts/upgrade
index 3f367f4..80a9dfc 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -79,6 +79,14 @@ ynh_add_fpm_config --phpversion=$phpversion --usage=$fpm_usage --footprint=$fpm_
 # Create a dedicated NGINX config
 ynh_add_nginx_config
 
+#=================================================
+# COMPOSER
+#=================================================
+
+ynh_script_progression --message="Pulling in external libraries with Composer..."
+
+ynh_install_composer
+
 #=================================================
 # SPECIFIC UPGRADE
 #=================================================