diff --git a/debian/rules b/debian/rules
index effad00..f1c8672 100755
--- a/debian/rules
+++ b/debian/rules
@@ -39,6 +39,10 @@ override_dh_auto_build:
 	NODE_PATH=node_modules rollup --sourcemap --environment BUNDLE:true --config build/rollup.config.mjs
 	esbuild dist/js/bootstrap.bundle.js --sourcemap --outfile=dist/js/bootstrap.bundle.min.js --minify
 
+	# bootstrap.esm.js
+	esbuild js/index.esm.js --bundle --sourcemap --outfile=dist/js/bootstrap.esm.js
+	esbuild dist/js/bootstrap.esm.js --sourcemap --outfile=dist/js/bootstrap.esm.min.js --minify
+
 override_dh_auto_install:
 	# disabled