diff --git a/composer.json b/composer.json
index 65543ad..c13b320 100644
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,7 @@
     "require": {
         "php": ">=8.0",
         "guzzlehttp/guzzle": "^7.5.0",
-        "firebase/php-jwt": "^v6.4.0"
+        "firebase/php-jwt": "^v7.0.2"
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^3.14.0",
diff --git a/lib/GetStream/Stream/Client.php b/lib/GetStream/Stream/Client.php
index f2bcddd..ed4233c 100644
--- a/lib/GetStream/Stream/Client.php
+++ b/lib/GetStream/Stream/Client.php
@@ -132,7 +132,7 @@ public function setLocation($location)
      * @param  ?array $extra_data
      * @return string
      */
-    public function createUserSessionToken($user_id, array $extra_data=null)
+    public function createUserSessionToken($user_id, ?array $extra_data=null)
     {
         if (is_null($extra_data)) {
             $extra_data = [];
@@ -145,7 +145,7 @@ public function createUserSessionToken($user_id, array $extra_data=null)
      * @param  ?array $extra_data
      * @return string
      */
-    public function createUserToken($user_id, array $extra_data=null)
+    public function createUserToken($user_id, ?array $extra_data=null)
     {
         if (is_null($extra_data)) {
             $extra_data = [];
diff --git a/lib/GetStream/Stream/ClientInterface.php b/lib/GetStream/Stream/ClientInterface.php
index 2cfa05f..fb45ee7 100644
--- a/lib/GetStream/Stream/ClientInterface.php
+++ b/lib/GetStream/Stream/ClientInterface.php
@@ -30,14 +30,14 @@ public function getCustomHttpHandlerStack();
      * @param ?array $extra_data
      * @return string
      */
-    public function createUserSessionToken($user_id, array $extra_data = null);
+    public function createUserSessionToken($user_id, ?array $extra_data = null);
 
     /**
      * @param string $user_id
      * @param ?array $extra_data
      * @return string
      */
-    public function createUserToken($user_id, array $extra_data = null);
+    public function createUserToken($user_id, ?array $extra_data = null);
 
     /**
      * @param BaseFeedInterface $feed
diff --git a/lib/GetStream/Stream/Reactions.php b/lib/GetStream/Stream/Reactions.php
index 9350500..2e98058 100644
--- a/lib/GetStream/Stream/Reactions.php
+++ b/lib/GetStream/Stream/Reactions.php
@@ -71,7 +71,7 @@ private function doRequest($method, $endpoint, $params=null)
      *
      * @return array
      */
-    public function add($kind, $activityId, $userId, array $data=null, array $targetFeeds=null, $targetFeedsExtraData=null)
+    public function add($kind, $activityId, $userId, ?array $data=null, ?array $targetFeeds=null, $targetFeedsExtraData=null)
     {
         $payload = [
             'kind' => $kind,
@@ -102,7 +102,7 @@ public function add($kind, $activityId, $userId, array $data=null, array $target
      *
      * @return array
      */
-    public function addChild($kind, $parentId, $userId, array $data=null, array $targetFeeds=null, $targetFeedsExtraData=null)
+    public function addChild($kind, $parentId, $userId, ?array $data=null, ?array $targetFeeds=null, $targetFeedsExtraData=null)
     {
         $payload = [
             'kind' => $kind,
@@ -170,7 +170,7 @@ public function restore($reactionId)
      *
      * @return array
      */
-    public function filter($lookupField, $lookupValue, $kind=null, array $params=null)
+    public function filter($lookupField, $lookupValue, $kind=null, ?array $params=null)
     {
         if (!in_array($lookupField, ["reaction_id", "activity_id", "user_id"])) {
             throw new StreamFeedException("Invalid request parameters");
@@ -205,7 +205,7 @@ public function get($reactionId)
      *
      * @return array
      */
-    public function update($reactionId, array $data=null, array $targetFeeds=null, $targetFeedsExtraData=null)
+    public function update($reactionId, ?array $data=null, ?array $targetFeeds=null, $targetFeedsExtraData=null)
     {
         $payload = [];
         if ($data !== null) {
diff --git a/lib/GetStream/Stream/Users.php b/lib/GetStream/Stream/Users.php
index e04df20..003e1b3 100644
--- a/lib/GetStream/Stream/Users.php
+++ b/lib/GetStream/Stream/Users.php
@@ -65,7 +65,7 @@ private function doRequest($method, $endpoint, $params=null)
      *
      * @return array
      */
-    public function add($userId, array $data=null, $getOrCreate=null)
+    public function add($userId, ?array $data=null, $getOrCreate=null)
     {
         $endpoint = 'user/';
         $payload = [
@@ -126,7 +126,7 @@ public function get($userId)
 
      * @return array
      */
-    public function update($userId, array $data=null)
+    public function update($userId, ?array $data=null)
     {
         $payload = [];
         if ($data !== null) {
diff --git a/tests/unit/ClientTest.php b/tests/unit/ClientTest.php
index f1ca1ab..3014f11 100644
--- a/tests/unit/ClientTest.php
+++ b/tests/unit/ClientTest.php
@@ -47,21 +47,21 @@ public function testClientSigning()
 
     public function testClientFeed()
     {
-        $client = new Client('key', 'secret', $location='qa');
+        $client = new Client('key', str_repeat('s', 32), $location='qa');
         $feed1 = $client->feed('flat', '1');
         $this->assertSame($feed1->getId(), 'flat:1');
     }
 
     public function testCreateReference()
     {
-        $client = new Client('key', 'secret', $location='qa');
+        $client = new Client('key', str_repeat('s', 32), $location='qa');
         $ref = $client->collections()->createReference("item", "42");
         $this->assertEquals($ref, "SO:item:42");
     }
 
     public function testCreateUserReference()
     {
-        $client = new Client('key', 'secret', $location='qa');
+        $client = new Client('key', str_repeat('s', 32), $location='qa');
         $ref = $client->users()->createReference("42");
         $this->assertEquals($ref, "SU:42");
     }