diff --git a/dev-ml/gapi-ocaml/metadata.xml b/dev-ml/gapi-ocaml/metadata.xml
index 550aa3b52af70..ee96f3b94b11c 100644
--- a/dev-ml/gapi-ocaml/metadata.xml
+++ b/dev-ml/gapi-ocaml/metadata.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
 <pkgmetadata>
   <maintainer type="project">
     <email>ml@gentoo.org</email>