diff --git a/guix-data-service/web/view/html.scm b/guix-data-service/web/view/html.scm
index 0f003ec..0e80454 100644
--- a/guix-data-service/web/view/html.scm
+++ b/guix-data-service/web/view/html.scm
@@ -67,11 +67,11 @@
                  (title "Guix Data Service"))
   `((doctype "html")
     (html
+     (@ (lang "en"))
      (head
       (title ,title)
       (meta (@ (http-equiv "Content-Type")
                (content "text/html; charset=UTF-8")))
-      (meta (@ (http-equiv "Content-Language") (content "en")))
       (meta (@ (name "author") (content "Christopher Baines")))
       (meta (@ (name "viewport")
                (content "width=device-width, initial-scale=1")))