diff --git a/composer.json b/composer.json
index dffd7f8bb5180bdeff22696ece6b131e6ebf9eab..a520653cf66db819b7dd4a642a7de1a29ea4bb16 100644
--- a/composer.json
+++ b/composer.json
@@ -10,16 +10,17 @@
         {
             "name": "Pascal Kanter",
             "email": "kanter@ub.uni-leipzig.de"
+        },
+        {
+            "name": "Robert Lange",
+            "email": "lange@ub.uni-leipzig.de"
         }
     ],
     "require": {
-        "php": ">=7.1",
-        "finc/vufindhttp-psrcompat": "^0.0",
-        "psr/http-client": "^1.0",
-        "guzzlehttp/psr7": "^1.4",
-        "ext-json": "*",
-        "finc/symfony-serializer-zend-bridge": "^0.0.1",
-        "symfony/property-info": "^3.4"
+        "php": "^7.3 || ^8.0",
+        "vufind-org/vufindhttp": "*",
+        "finc/symfony-serializer-zend-bridge": "^2.0",
+        "ext-json": "*"
     },
     "autoload": {
         "psr-4": {
@@ -28,7 +29,7 @@
     },
     "autoload-dev": {
         "psr-4": {
-            "finc\\Boss\\tests": "tests/"
+            "finc\\Boss\\tests\\": "tests/"
         }
     },
     "scripts": {
diff --git a/src/Client/BossClient.php b/src/Client/BossClient.php
index fe833f955f14ff18944bdaec3ced5ec0b52eddd9..94b92902be3b5c1e641d74deb5c4f2650e105e70 100644
--- a/src/Client/BossClient.php
+++ b/src/Client/BossClient.php
@@ -21,12 +21,10 @@
 
 namespace finc\Boss\Client;
 
-use GuzzleHttp\Psr7\Request;
-use GuzzleHttp\Psr7\Uri;
-use Psr\Http\Client\ClientInterface;
 use Symfony\Component\Serializer\Encoder\JsonEncoder;
 use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
 use Symfony\Component\Serializer\SerializerInterface;
+use VuFindHttp\HttpServiceInterface as HttpService;
 
 /**
  * "Get Boss data" AJAX Handler
@@ -45,9 +43,9 @@ class BossClient
 
     /**
      *
-     * @var ClientInterface
+     * @var HttpService
      */
-    protected $httpClient;
+    protected $httpService;
 
     /**
      * @var SerializerInterface
@@ -57,16 +55,15 @@ class BossClient
     /**
      * Client constructor.
      *
-     * @param ClientInterface $httpClient
-     * @param SerializerInterface $serializer
+     * @param HttpService             $httpService
+     * @param SerializerInterface     $serializer
      */
     public function __construct(
-        ClientInterface $httpClient,
+        HttpService $httpService,
         SerializerInterface $serializer
     ) {
-        $this->httpClient = $httpClient;
+        $this->httpService = $httpService;
         $this->serializer = $serializer;
-        $this->baseUrl = new Uri(static::BOSS_URL);
     }
 
     /**
@@ -82,10 +79,14 @@ class BossClient
     {
         $retval = [];
         foreach ($isxns as $isxn) {
+            
+            $uri = static::BOSS_URL . "?isxn[]=$isxn&network=$network";
+            $client = $this->httpService->createClient(
+                $uri
+            );
 
-            $uri = $this->baseUrl->withQuery("isxn[]=$isxn&network=$network");
-            $request = new Request('GET', $uri);
-            $response = $this->httpClient->sendRequest($request);
+            /* @var \Laminas\Http\Response $response */
+            $response = $client->send();
 
             if ($response->getStatusCode() == "200") {
                 $data = $this->lookupData($response);
diff --git a/src/Client/BossClientFactory.php b/src/Client/BossClientFactory.php
index 8a98a03c8466de74cb409c641b615d00512be2ea..af5826d096f7c04c1a8c6baa05227056be7d2258 100644
--- a/src/Client/BossClientFactory.php
+++ b/src/Client/BossClientFactory.php
@@ -20,8 +20,7 @@
  */
 namespace finc\Boss\Client;
 
-use Interop\Container\ContainerInterface;
-use Psr\Http\Client\ClientInterface;
+use Psr\Container\ContainerInterface;
 use Symfony\Component\Serializer\SerializerInterface;
 
 /**
@@ -45,10 +44,9 @@ class BossClientFactory
      */
     public function __invoke(ContainerInterface $container)
     {
-        /** @var ClientInterface $httpClient */
-        $httpClient = $container->get(ClientInterface::class);
-        /** @var SerializerInterface $serializer */
-        $serializer = $container->get(SerializerInterface::class);
-        return new BossClient($httpClient, $serializer);
+        return new BossClient(
+            $container->get(\VuFindHttp\HttpService::class),
+            $container->get(SerializerInterface::class)
+        );
     }
 }