diff --git a/app/views/auth/register.phtml b/app/views/auth/register.phtml
index c0c05758f..96794d8b2 100644
--- a/app/views/auth/register.phtml
+++ b/app/views/auth/register.phtml
@@ -26,7 +26,7 @@
 				<label for="new_user_email">
 					<?= _t('gen.auth.email') ?>
 				</label>
-				<input id="new_user_email" name="new_user_email" type="email" required />
+				<input id="new_user_email" name="new_user_email" type="email" required="required" />
 			</div>
 		<?php } ?>
 
@@ -44,7 +44,7 @@
 		<?php if ($this->show_tos_checkbox) { ?>
 			<div class="form-group">
 				<label class="checkbox" for="accept-tos">
-					<input type="checkbox" name="accept_tos" id="accept-tos" value="1" required />
+					<input type="checkbox" name="accept_tos" id="accept-tos" value="1" required="required" />
 					<?= _t('gen.auth.accept_tos', _url('index', 'tos')) ?>
 				</label>
 			</div>
diff --git a/app/views/configure/integration.phtml b/app/views/configure/integration.phtml
index e8ca5c3a3..c6deea5c2 100644
--- a/app/views/configure/integration.phtml
+++ b/app/views/configure/integration.phtml
@@ -6,7 +6,7 @@
 	<form method="post" action="<?= _url('configure', 'integration') ?>"
 		data-simple='<div class="form-group" id="group-share-##key##"><label class="group-name">##label##</label><div class="group-controls"><div class="stick">
 			<input type="text" id="share_##key##_name" name="share[##key##][name]" class="extend" value="##label##" placeholder="<?= _t('conf.sharing.share_name') ?>" size="64" />
-			<input type="url" id="share_##key##_url" name="share[##key##][url]" class="extend" value="" placeholder="<?= _t('gen.short.not_applicable') ?>" size="64" disabled />
+			<input type="url" id="share_##key##_url" name="share[##key##][url]" class="extend" value="" placeholder="<?= _t('gen.short.not_applicable') ?>" size="64" disabled="disabled" />
 			<a href="#" class="remove btn btn-attention"><?= _i('close') ?></a></div>
 			<input type="hidden" id="share_##key##_type" name="share[##key##][type]" value="##type##" /></div></div>'
 		data-advanced='<div class="form-group" id="group-share-##key##"><label class="group-name">##label##</label><div class="group-controls">
diff --git a/app/views/helpers/feed/update.phtml b/app/views/helpers/feed/update.phtml
index 8127875ed..23a0e3ffa 100644
--- a/app/views/helpers/feed/update.phtml
+++ b/app/views/helpers/feed/update.phtml
@@ -250,7 +250,7 @@
 			<div class="form-group">
 				<div class="group-controls">
 					<label class="checkbox" for="pubsubhubbub">
-						<input type="checkbox" name="pubsubhubbub" id="pubsubhubbub" disabled="disabled" value="1" checked />
+						<input type="checkbox" name="pubsubhubbub" id="pubsubhubbub" disabled="disabled" value="1" checked="checked" />
 						<?= _t('sub.feed.websub') ?>
 					</label>
 				</div>
diff --git a/app/views/user/manage.phtml b/app/views/user/manage.phtml
index 4332562e9..c22affc9d 100644
--- a/app/views/user/manage.phtml
+++ b/app/views/user/manage.phtml
@@ -43,7 +43,7 @@
 					<?= _t('gen.auth.email') ?>
 				</label>
 				<div class="group-controls">
-					<input id="new_user_email" name="new_user_email" type="email" required />
+					<input id="new_user_email" name="new_user_email" type="email" required="required" />
 				</div>
 			</div>
 		<?php } ?>
diff --git a/app/views/user/profile.phtml b/app/views/user/profile.phtml
index 3fc79bb47..799ead160 100644
--- a/app/views/user/profile.phtml
+++ b/app/views/user/profile.phtml
@@ -22,7 +22,7 @@
 			<div class="form-group">
 				<div class="group-controls">
 					<label class="checkbox" for="is_admin">
-						<input type="checkbox" id="is_admin" disabled checked />
+						<input type="checkbox" id="is_admin" disabled="disabled" checked="checked" />
 						<?= _t('conf.user.is_admin') ?>
 					</label>
 				</div>