diff --git a/app-arch/zarchive/metadata.xml b/app-arch/zarchive/metadata.xml
index a2a4b7118f..981e6de864 100644
--- a/app-arch/zarchive/metadata.xml
+++ b/app-arch/zarchive/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>denis7774@gmail.com</email>
diff --git a/dev-python/click-command-tree/metadata.xml b/dev-python/click-command-tree/metadata.xml
index e594cd4ac8..7a9594ebce 100644
--- a/dev-python/click-command-tree/metadata.xml
+++ b/dev-python/click-command-tree/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-needed -->
   <upstream>
diff --git a/dev-python/nkdfu/metadata.xml b/dev-python/nkdfu/metadata.xml
index e39497aa49..77d008d46c 100644
--- a/dev-python/nkdfu/metadata.xml
+++ b/dev-python/nkdfu/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-needed -->
   <upstream>
diff --git a/dev-util/wxformbuilder/metadata.xml b/dev-util/wxformbuilder/metadata.xml
index 743341e42f..0a45098b82 100644
--- a/dev-util/wxformbuilder/metadata.xml
+++ b/dev-util/wxformbuilder/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>vowstar@gmail.com</email>