diff --git a/webpackBaseConfig.js b/webpackBaseConfig.js
index 60dc7ce1..13686e7d 100644
--- a/webpackBaseConfig.js
+++ b/webpackBaseConfig.js
@@ -205,7 +205,8 @@ module.exports = {
             path.join(__dirname, 'public/css/github-extract.css'),
             path.join(__dirname, 'public/vendor/showup/showup.css'),
             path.join(__dirname, 'public/css/mermaid.css'),
-            path.join(__dirname, 'public/css/markdown.css')
+            path.join(__dirname, 'public/css/markdown.css'),
+            path.join(__dirname, 'public/css/slide-preview.css')
         ],
         "index-styles-pack": [
             path.join(__dirname, 'node_modules/bootstrap/dist/css/bootstrap.min.css'),
@@ -253,7 +254,8 @@ module.exports = {
         "pretty-styles": [
             path.join(__dirname, 'public/css/github-extract.css'),
             path.join(__dirname, 'public/css/mermaid.css'),
-            path.join(__dirname, 'public/css/markdown.css')
+            path.join(__dirname, 'public/css/markdown.css'),
+            path.join(__dirname, 'public/css/slide-preview.css')
         ],
         "pretty-styles-pack": [
             path.join(__dirname, 'node_modules/bootstrap/dist/css/bootstrap.min.css'),