diff --git a/README b/README
index 41936da..0bbf99a 100644
--- a/README
+++ b/README
@@ -145,5 +145,5 @@ MAILING LISTS
 To stay abreast of, and provide input to, git-crypt development, consider
 subscribing to one or both of our mailing lists:
 
-Announcements: http://lists.cloudmutt.com/mailman/listinfo/git-crypt-announce
-Discussion:    http://lists.cloudmutt.com/mailman/listinfo/git-crypt-discuss
+Announcements: https://lists.cloudmutt.com/mailman/listinfo/git-crypt-announce
+Discussion:    https://lists.cloudmutt.com/mailman/listinfo/git-crypt-discuss
diff --git a/README.md b/README.md
index 3a6c082..965d1c4 100644
--- a/README.md
+++ b/README.md
@@ -147,5 +147,5 @@ Mailing Lists
 To stay abreast of, and provide input to, git-crypt development,
 consider subscribing to one or both of our mailing lists:
 
-* [Announcements](http://lists.cloudmutt.com/mailman/listinfo/git-crypt-announce)
-* [Discussion](http://lists.cloudmutt.com/mailman/listinfo/git-crypt-discuss)
+* [Announcements](https://lists.cloudmutt.com/mailman/listinfo/git-crypt-announce)
+* [Discussion](https://lists.cloudmutt.com/mailman/listinfo/git-crypt-discuss)