diff --git a/src/Commands/AuthenticateCommand.php b/src/Commands/AuthenticateCommand.php
index a7edfe8..9283c4c 100644
--- a/src/Commands/AuthenticateCommand.php
+++ b/src/Commands/AuthenticateCommand.php
@@ -51,8 +51,13 @@ class AuthenticateCommand extends AbstractCommand
      * @param string $charset
      * @throws \InvalidArgumentException for invalid/unknown charset name
      */
-    public function __construct($user, $passwd, $dbname, $charset)
-    {
+    public function __construct(
+        $user,
+        #[\SensitiveParameter]
+        $passwd,
+        $dbname,
+        $charset
+    ) {
         if (!isset(self::$charsetMap[$charset])) {
             throw new \InvalidArgumentException('Unsupported charset selected');
         }
diff --git a/src/Factory.php b/src/Factory.php
index 351ffb6..1ccee7e 100644
--- a/src/Factory.php
+++ b/src/Factory.php
@@ -156,8 +156,10 @@ public function __construct(LoopInterface $loop = null, ConnectorInterface $conn
      * @param string $uri
      * @return PromiseInterface Promise<ConnectionInterface, Exception>
      */
-    public function createConnection($uri)
-    {
+    public function createConnection(
+        #[\SensitiveParameter]
+        $uri
+    ) {
         if (strpos($uri, '://') === false) {
             $uri = 'mysql://' . $uri;
         }
@@ -374,8 +376,10 @@ public function createConnection($uri)
      * @param string $uri
      * @return ConnectionInterface
      */
-    public function createLazyConnection($uri)
-    {
+    public function createLazyConnection(
+        #[\SensitiveParameter]
+        $uri
+    ) {
         return new LazyConnection($this, $uri, $this->loop);
     }
 }
diff --git a/src/Io/LazyConnection.php b/src/Io/LazyConnection.php
index 3fc58cd..b493456 100644
--- a/src/Io/LazyConnection.php
+++ b/src/Io/LazyConnection.php
@@ -31,8 +31,12 @@ class LazyConnection extends EventEmitter implements ConnectionInterface
     private $idleTimer;
     private $pending = 0;
 
-    public function __construct(Factory $factory, $uri, LoopInterface $loop)
-    {
+    public function __construct(
+        Factory $factory,
+        #[\SensitiveParameter]
+        $uri,
+        LoopInterface $loop
+    ) {
         $args = [];
         \parse_str((string) \parse_url($uri, \PHP_URL_QUERY), $args);
         if (isset($args['idle'])) {