diff --git a/_config/filters.js b/_config/filters.js
index 4af2fe8..3f247fb 100644
--- a/_config/filters.js
+++ b/_config/filters.js
@@ -37,4 +37,7 @@ export default function(eleventyConfig) {
 		return (tags || []).filter(tag => ["all", "posts"].indexOf(tag) === -1);
 	});
 
+	eleventyConfig.addFilter("sortAlphabetically", strings =>
+		(strings || []).sort((b, a) => b.localeCompare(a))
+	);
 };
diff --git a/content/tags.njk b/content/tags.njk
index 2423935..5346f27 100644
--- a/content/tags.njk
+++ b/content/tags.njk
@@ -1,7 +1,7 @@
 <h1>Tags</h1>
 
 <ul>
-{% for tag in collections | getKeys | filterTagList %}
+{% for tag in collections | getKeys | filterTagList | sortAlphabetically %}
 	{% set tagUrl %}/tags/{{ tag | slugify }}/{% endset %}
 	<li><a href="{{ tagUrl }}" class="post-tag">{{ tag }}</a></li>
 {% endfor %}