diff --git a/lib/static.js b/lib/static.js
index 9c4d32e..7f7a68c 100644
--- a/lib/static.js
+++ b/lib/static.js
@@ -27,7 +27,7 @@ const write = (target, content) => {
   return fs.outputFile(target, content);
 };
 
-const copyAssetsFromOptions = function (markdown) {
+const copyAssetsFromOptions = async function (markdown) {
   const { yamlOptions } = parseYamlFrontMatter(markdown.toString());
   const options = getSlideOptions(yamlOptions);
   const staticDir = getStaticDir();
@@ -44,14 +44,15 @@ const copyAssetsFromOptions = function (markdown) {
       _.partialRight(_.map, asset => cp(asset, path.join(staticDir, getAssetsDir(), asset)))
     )([
       typeof options.scripts === 'string' ? options.scripts.split(',') : options.scripts,
-      typeof options.css === 'string' ? options.css.split(',') : options.css
+      typeof options.css === 'string' ? options.css.split(',') : options.css,
+      (await fs.pathExists(options.theme)) ? options.theme : null
     ])
   );
 };
 
 const copyAssetsAndWriteFile = async (sourceDir, file, targetDir) => {
   const markdown = await fs.readFile(path.join(sourceDir, file));
-  const awaits = copyAssetsFromOptions(markdown);
+  const awaits = await copyAssetsFromOptions(markdown);
   let image;
   while ((image = mdImageRE.exec(markdown))) {
     const [, , imgPath] = image;