diff --git a/scripts/install b/scripts/install
index a9ca4ab..0f7fd56 100644
--- a/scripts/install
+++ b/scripts/install
@@ -134,9 +134,7 @@ ynh_script_progression --message="Building Ghost... (this will take some time an
 pushd "$final_path"
 	ynh_use_nodejs
 	ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH yarn install --non-interactive
-	ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH yarn add knex-migrator
 	ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH $final_path/node_modules/.bin/knex-migrator init
-	ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH yarn add grunt-cli ember-cli
 	ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH $final_path/node_modules/.bin/grunt symlink
 	ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH $final_path/node_modules/.bin/grunt init --force
 popd
diff --git a/scripts/upgrade b/scripts/upgrade
index db57ebc..304bc31 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -163,9 +163,7 @@ then
 
 	pushd "$final_path"
 		ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH yarn install --non-interactive
-		ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH yarn add knex-migrator
 		ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH $final_path/node_modules/.bin/knex-migrator init
-		ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH yarn add grunt-cli ember-cli
 		ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH $final_path/node_modules/.bin/grunt symlink
 		ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH $final_path/node_modules/.bin/grunt init --force
 	popd