diff --git a/scripts/install b/scripts/install
index d4cbfde..73626e3 100755
--- a/scripts/install
+++ b/scripts/install
@@ -53,7 +53,9 @@ ynh_script_progression --message="Configuring the app..." --weight=15
 
 pushd $install_dir
 	ynh_use_nodejs
-	ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH yarn install
+	rm .cache/yarn/* -rf
+	rm node_modules -rf
+	ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH yarn install --production
 	ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH yarn build
 popd
 
diff --git a/scripts/upgrade b/scripts/upgrade
index b38e332..e6976b3 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -72,7 +72,7 @@ ynh_script_progression --message="Configuring the app..." --weight=15
 
 pushd $install_dir
 	ynh_use_nodejs
-	ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH yarn install
+	ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH yarn install --production
 	ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH yarn build
 	#ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH yarn update-db
 popd