diff --git a/layouts/_default/baseof.html b/layouts/_default/baseof.html
index 7b41d5f..bb6fbd4 100644
--- a/layouts/_default/baseof.html
+++ b/layouts/_default/baseof.html
@@ -23,9 +23,11 @@
 {{ if in site.Params.avatar "http" }}<!---->
 {{ $.Scratch.Set "avatar_url" site.Params.avatar }}<!---->
 {{ else }}<!---->
+{{ $official_cdn := "https://www.gravatar.com/avatar/" }}<!---->
+{{ $cdn := (site.Params.gravatarCdn | default $official_cdn) }}<!---->
 {{ $md5 := (md5 site.Params.avatar) }}<!---->
-{{ $url := print "https://www.gravatar.com/avatar/" $md5 "?s=160&d=identicon" }}<!---->
-{{ $.Scratch.Set "avatar_url" $url }}<!---->
+{{ $avatar_url := print $cdn $md5 "?s=160&d=identicon" }}<!---->
+{{ $.Scratch.Set "avatar_url" $avatar_url }}<!---->
 {{ end }}<!---->
 {{ end }}<!---->