diff --git a/exampleSite/content/basics/migration/_index.en.md b/exampleSite/content/basics/migration/_index.en.md
index d81d4b7d39..7f115590ea 100644
--- a/exampleSite/content/basics/migration/_index.en.md
+++ b/exampleSite/content/basics/migration/_index.en.md
@@ -40,6 +40,8 @@ This document shows you what's new in the latest release and flags it with one o
 
 - {{% badge style="info" icon="plus-circle" title=" " %}}New{{% /badge %}} The themes [config](basics/configuration) and [frontmatter](cont/frontmatter) options received a comprehensive documentation update. In addition the theme switched from `config.toml` to `hugo.toml`.
 
+- {{% badge style="info" icon="plus-circle" title=" " %}}New{{% /badge %}} Restored compatibility with Hugo versions {{% badge color="fuchsia" icon="fab fa-hackerrank" title=" " %}}0.121.0{{% /badge %}} or higher for the [`highlight` shortcode](shortcodes/highlight). This does not change the minimum required Hugo version.
+
 ---
 
 ## 5.23.0 (2023-11-03) {#5230}
diff --git a/layouts/partials/shortcodes/highlight.html b/layouts/partials/shortcodes/highlight.html
index 8950aa53cd..bc47481487 100644
--- a/layouts/partials/shortcodes/highlight.html
+++ b/layouts/partials/shortcodes/highlight.html
@@ -59,7 +59,7 @@
 {{- end }}
 {{- $params := slice }}
 {{- range $k, $v := $options }}
-  {{- $params = $params | append (printf "%s=%s" $k $v) }}
+  {{- $params = $params | append (printf "%s=%s" $k (string $v)) }}
 {{- end }}
 {{- $params = delimit $params ", " }}
 {{- $title := "" }}