diff --git a/src/BigBlueButton.php b/src/BigBlueButton.php
index 24ebec9c..dc026624 100644
--- a/src/BigBlueButton.php
+++ b/src/BigBlueButton.php
@@ -92,8 +92,12 @@ class BigBlueButton
     /**
      * @param null|array<string, mixed> $opts
      */
-    public function __construct(?string $baseUrl = null, ?string $secret = null, ?array $opts = [])
-    {
+    public function __construct(
+        ?string $baseUrl = null,
+        #[\SensitiveParameter]
+        ?string $secret = null,
+        ?array $opts = [],
+    ) {
         // Provide an early error message if configuration is wrong
         if (is_null($baseUrl) && false === getenv('BBB_SERVER_BASE_URL')) {
             throw new \RuntimeException('No BBB-Server-Url found! Please provide it either in constructor '
diff --git a/src/Util/UrlBuilder.php b/src/Util/UrlBuilder.php
index 5a537af6..0ce24505 100644
--- a/src/Util/UrlBuilder.php
+++ b/src/Util/UrlBuilder.php
@@ -47,16 +47,22 @@ 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);
     }
 
     // Getters & Setters
-    public function setSecret(string $secret): self
-    {
+    public function setSecret(
+        #[\SensitiveParameter]
+        string $secret,
+    ): self {
         $this->secret = $secret;
 
         return $this;