diff --git a/dev-libs/olm/metadata.xml b/dev-libs/olm/metadata.xml
index 15a33f236d..27acf70972 100644
--- a/dev-libs/olm/metadata.xml
+++ b/dev-libs/olm/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="person">
 		<email>gentoo@tastytea.de</email>