diff --git a/README.md b/README.md
index af69cd9e2a..9b9fb62498 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,7 @@ The theme is a fork of the great [Learn theme](https://github.com/matcornic/hugo
 
 ## Main features
 
+- Usable offline, no external dependencies
 - Automatic Search
 - Multilingual mode for English, Arabic, Simplified Chinese, Dutch, French, German, Hindi, Indonesian, Japanese, Korean, Portuguese, Russian, Spanish, Vietnamese, Turkish
 - Unlimited menu levels
diff --git a/exampleSite/content/_index.en.md b/exampleSite/content/_index.en.md
index 57dad0316f..292fe77299 100644
--- a/exampleSite/content/_index.en.md
+++ b/exampleSite/content/_index.en.md
@@ -16,6 +16,7 @@ The theme is a fork of the great [Learn theme](https://github.com/matcornic/hugo
 See [what's new]({{% relref "basics/migration" %}}) within the latest update.
 {{% /notice %}}
 
+* Usable offline, no external dependencies
 * [Automatic Search]({{%relref "basics/configuration#activate-search" %}})
 * [Multilingual mode]({{%relref "cont/i18n" %}}) for English, Arabic, Simplified Chinese, Dutch, French, German, Hindi, Indonesian, Japanese, Korean, Portuguese, Russian, Spanish, Vietnamese, Turkish
 * Unlimited menu levels
diff --git a/exampleSite/content/shortcodes/mermaid.en.md b/exampleSite/content/shortcodes/mermaid.en.md
index 393cf40256..6ae432fb35 100644
--- a/exampleSite/content/shortcodes/mermaid.en.md
+++ b/exampleSite/content/shortcodes/mermaid.en.md
@@ -5,6 +5,10 @@ title = "Mermaid"
 
 [Mermaid](https://mermaidjs.github.io/) is a library helping you to generate diagram and flowcharts from text, in a similar manner as Markdown.
 
+{{% notice note %}}
+This only works in modern browsers.
+{{% /notice %}}
+
 {{% notice warning %}}
 Due to limitations with [Mermaid](https://github.com/mermaid-js/mermaid/issues/1846), it is currently not possible to use Mermaid code fences in an initially collapsed `expand` shortcode. This is a know issue and [can't be fixed by this theme](https://github.com/McShelby/hugo-theme-relearn/issues/187).
 {{% /notice %}}