diff --git a/templates/OpdsAcquisitionFeed.php b/templates/OpdsAcquisitionFeed.php
index 48efa8cb..b51d8a3b 100644
--- a/templates/OpdsAcquisitionFeed.php
+++ b/templates/OpdsAcquisitionFeed.php
@@ -16,7 +16,7 @@ $subtitle = $subtitle ?? null;
 // We have to add it programmatically when saving the feed file.
 print("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
 ?>
-<feed xmlns="http://www.w3.org/2005/Atom" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:schema="http://schema.org/"<? if($isCrawlable){ ?> xmlns:fh="http://purl.org/syndication/history/1.0"<? } ?>>
+<feed xmlns="http://www.w3.org/2005/Atom" xmlns:dc="http://purl.org/dc/terms/" xmlns:schema="http://schema.org/"<? if($isCrawlable){ ?> xmlns:fh="http://purl.org/syndication/history/1.0"<? } ?>>
 	<id><?= SITE_URL . Formatter::ToPlainXmlText($id) ?></id>
 	<link href="<?= SITE_URL . Formatter::ToPlainXmlText($url) ?>" rel="self" type="application/atom+xml;profile=opds-catalog;kind=acquisition; charset=utf-8"/>
 	<link href="<?= SITE_URL ?>/feeds/opds" rel="start" type="application/atom+xml;profile=opds-catalog;kind=navigation; charset=utf-8"/>
diff --git a/templates/OpdsNavigationFeed.php b/templates/OpdsNavigationFeed.php
index 1ae3b060..9ac7fa37 100644
--- a/templates/OpdsNavigationFeed.php
+++ b/templates/OpdsNavigationFeed.php
@@ -7,7 +7,7 @@ $subtitle = $subtitle ?? null;
 // We have to add it programmatically when saving the feed file.
 print("<?xml version=\"1.0\" encoding=\"utf-8\"?>\n");
 ?>
-<feed xmlns="http://www.w3.org/2005/Atom" xmlns:dc="http://purl.org/dc/elements/1.1/">
+<feed xmlns="http://www.w3.org/2005/Atom" xmlns:dc="http://purl.org/dc/terms/">
 	<id><?= SITE_URL . Formatter::ToPlainXmlText($id) ?></id>
 	<link href="<?= SITE_URL . Formatter::ToPlainXmlText($url) ?>" rel="self" type="application/atom+xml;profile=opds-catalog;kind=navigation; charset=utf-8"/>
 	<link href="<?= SITE_URL ?>/feeds/opds" rel="start" type="application/atom+xml;profile=opds-catalog;kind=navigation; charset=utf-8"/>