Update _config.yml

_config.yml

@@ -1,6 +1,6 @@
 title: PeproDev Ultimate Invoice
 description: The most complete invoice plugin you will ever need. Easily create HTML/PDF invoices for your WC orders, in a beautiful style and e-mail it to your customers. 
-theme: modernist
+remote_theme: pages-themes/modernist@v0.2.0
 show_downloads: true
 
 # Include the README.md file as the homepage
@@ -18,6 +18,7 @@ exclude:
 # Build settings
 plugins:
   - jekyll-redirect-from
+  - jekyll-remote-theme
 
 # Redirect index.html to README.md if someone directly accesses it
 redirect_from: