diff --git a/CHANGELOG.md b/CHANGELOG.md
index 265906b8..d771ab62 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 ### Bug Fixes
 
 - "You may also enjoy" no longer recommends hidden posts. [#4653](https://github.com/mmistakes/minimal-mistakes/issues/4653)
+- Replaced dead link to "Viewport and Media Queries" slides. [#4421](https://github.com/mmistakes/minimal-mistakes/discussions/4421)
 
 ### Enhancements
 
diff --git a/_includes/head.html b/_includes/head.html
index c58acce4..87bc5e5b 100644
--- a/_includes/head.html
+++ b/_includes/head.html
@@ -6,7 +6,7 @@
   <link href="{% if site.atom_feed.path %}{{ site.atom_feed.path }}{% else %}{{ '/feed.xml' | relative_url }}{% endif %}" type="application/atom+xml" rel="alternate" title="{{ site.title }} Feed">
 {% endunless %}
 
-<!-- https://t.co/dKP3o1e -->
+{%- comment %} https://docs.google.com/presentation/d/1rmxwWa9P6_xHqonmh5ONXRS-jPc5XKbnv99Rjkhe04s/present {% endcomment -%}
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 
 <script>
diff --git a/docs/_docs/18-history.md b/docs/_docs/18-history.md
index c87563a3..75f55a82 100644
--- a/docs/_docs/18-history.md
+++ b/docs/_docs/18-history.md
@@ -5,7 +5,7 @@ permalink: "/docs/history/"
 excerpt: Change log of enhancements and bug fixes made to the theme.
 sidebar:
   nav: docs
-last_modified_at: '2024-04-26T00:43:39+08:00'
+last_modified_at: '2024-04-26T00:45:40+08:00'
 toc: false
 ---
 
@@ -20,6 +20,7 @@ toc: false
 ### Bug Fixes
 
 - "You may also enjoy" no longer recommends hidden posts. [#4653](https://github.com/mmistakes/minimal-mistakes/issues/4653)
+- Replaced dead link to "Viewport and Media Queries" slides. [#4421](https://github.com/mmistakes/minimal-mistakes/discussions/4421)
 
 ### Enhancements