diff --git a/src/BigBlueButton.php b/src/BigBlueButton.php
index 64d43e94..e1a4890a 100644
--- a/src/BigBlueButton.php
+++ b/src/BigBlueButton.php
@@ -94,6 +94,7 @@ class BigBlueButton
      */
     public function __construct(
         ?string $baseUrl = null,
+        #[\SensitiveParameter]
         ?string $secret = null,
         ?array $opts = [],
         ?UrlBuilder $urlBuilder = null,
diff --git a/src/Util/UrlBuilder.php b/src/Util/UrlBuilder.php
index b4a7abb7..3401b9c1 100644
--- a/src/Util/UrlBuilder.php
+++ b/src/Util/UrlBuilder.php
@@ -47,8 +47,12 @@ class UrlBuilder
 
     private string $baseUrl;
 
-    public function __construct(string $secret, string $baseUrl, HashingAlgorithm $hashingAlgorithm)
-    {
+    public function __construct(
+        #[\SensitiveParameter]
+        string $secret,
+        string $baseUrl,
+        HashingAlgorithm $hashingAlgorithm,
+    ) {
         $this->setSecret($secret);
         $this->setBaseUrl($baseUrl);
         $this->setHashingAlgorithm($hashingAlgorithm);
@@ -91,8 +95,10 @@ public static function fromEnvVars(
     }
 
     // Getters & Setters
-    public function setSecret(string $secret): self
-    {
+    public function setSecret(
+        #[\SensitiveParameter]
+        string $secret,
+    ): self {
         $this->secret = $secret;
 
         return $this;