diff --git a/src/Core/DB/DB.php b/src/Core/DB/DB.php
index b5b5ccb3e5..813cf2492c 100644
--- a/src/Core/DB/DB.php
+++ b/src/Core/DB/DB.php
@@ -221,7 +221,7 @@ class DB
         $metadata = self::getClassMetadata(\get_class($owner));
         $seqName  = $metadata->getSequenceName($conn->getDatabasePlatform());
         self::persist($owner);
-        $id = $conn->lastInsertId($seqName);
+        $id = (int ) $conn->lastInsertId($seqName);
         F\map(\is_array($others) ? $others : [$others], function ($o) use ($id) { $o->setId($id); self::persist($o); });
         if (!\is_null($extra)) {
             $extra($id);
diff --git a/src/Util/HTML.php b/src/Util/HTML.php
index c9b6d4c4a4..f0711db9c5 100644
--- a/src/Util/HTML.php
+++ b/src/Util/HTML.php
@@ -113,7 +113,7 @@ abstract class HTML
                     $out .= "<{$tag}/>";
                 } else {
                     $attrs  = isset($contents['attrs']) ? self::attr(array_shift($contents), $options) : '';
-                    $is_tag = preg_match('/[A-Za-z][A-Za-z0-9]*/', $tag);
+                    $is_tag = is_string($tag) && preg_match('/[A-Za-z][A-Za-z0-9]*/', $tag);
                     $inner  = self::html($contents, $options, $indent + 1);
                     if ($is_tag) {
                         if (!\in_array($tag, array_merge($options['allowed_tags'] ?? [], self::ALLOWED_TAGS))) {