diff --git a/docs/changelog/main.md b/docs/changelog/main.md
index 1763480a..094c14a9 100644
--- a/docs/changelog/main.md
+++ b/docs/changelog/main.md
@@ -1,2 +1,4 @@
+# Unreleased changes on the mainline
 
 * Expose ready queue size to metrics. #30
+* Fixed IPv6 lookups for domains without MX records
diff --git a/mkdocs-base.yml b/mkdocs-base.yml
index d1142e53..e1bfbadc 100644
--- a/mkdocs-base.yml
+++ b/mkdocs-base.yml
@@ -63,6 +63,10 @@ markdown_extensions:
   - admonition
   - pymdownx.details
   - def_list
+  - pymdownx.magiclink:
+      repo_url_shorthand: true
+      user: KumoCorp
+      repo: kumomta
   - pymdownx.highlight:
       anchor_linenums: true
       line_spans: __span