diff --git a/api/composer.json b/api/composer.json
index 8101fed18..8ec82129d 100644
--- a/api/composer.json
+++ b/api/composer.json
@@ -21,12 +21,13 @@
     "mpdf/mpdf": "8.1.2",
     "ralouphie/getallheaders": "2.0.5",
     "slim/slim": "2.6.2",
-    "stomp-php/stomp-php": "3.0.6",
+    "php-amqplib/php-amqplib": "^2.0",
     "symfony/http-foundation": "^5.4",
     "symfony/filesystem": "^5.4",
     "mpdf/qrcode": "^1.2",
     "mtcmedia/dhl-api": "dev-master#9b4b6315",
-    "maennchen/zipstream-php": "2.1.0"
+    "maennchen/zipstream-php": "2.1.0",
+    "phpseclib/bcmath_compat": "^2.0"
   },
   "autoload": {
     "psr-4": {
diff --git a/api/src/Page.php b/api/src/Page.php
index c9f293507..f098868f9 100644
--- a/api/src/Page.php
+++ b/api/src/Page.php
@@ -1109,14 +1109,16 @@ function _submit_zocalo_recipe($recipe, $parameters, $error_code = 500)
     }
 
 
-    function _send_zocalo_message($zocalo_queue, $zocalo_message, $error_code = 500)
+    function _send_zocalo_message($rabbitmq_zocalo_vhost, $zocalo_message, $error_code = 500)
     {
         global
-        $zocalo_server,
-        $zocalo_username,
-        $zocalo_password;
+        $rabbitmq_zocalo_host,
+        $rabbitmq_zocalo_port,
+        $rabbitmq_zocalo_username,
+        $rabbitmq_zocalo_password,
+        $rabbitmq_zocalo_routing_key;
 
-        if (empty($zocalo_server) || empty($zocalo_queue))
+        if (empty($rabbitmq_zocalo_host) || empty($rabbitmq_zocalo_vhost))
         {
             $message = 'Zocalo server or queue not specified.';
             error_log($message);
@@ -1129,8 +1131,8 @@ function _send_zocalo_message($zocalo_queue, $zocalo_message, $error_code = 500)
         try
         {
             error_log("Sending message" . var_export($zocalo_message, true));
-            $queue = new Queue($zocalo_server, $zocalo_username, $zocalo_password);
-            $queue->send($zocalo_queue, $zocalo_message, true, $this->user->loginId);
+            $queue = new Queue($rabbitmq_zocalo_host, $rabbitmq_zocalo_port, $rabbitmq_zocalo_username, $rabbitmq_zocalo_password, $rabbitmq_zocalo_vhost);
+            $queue->send($zocalo_message, $rabbitmq_zocalo_routing_key);
         }
         catch (Exception $e)
         {
diff --git a/api/src/Page/Process.php b/api/src/Page/Process.php
index 70fadb66d..d26ccd61b 100644
--- a/api/src/Page/Process.php
+++ b/api/src/Page/Process.php
@@ -355,7 +355,7 @@ function _add_reprocessing_sweep($args) {
 
     function _enqueue()
     {
-        global $zocalo_mx_reprocess_queue;
+        global $rabbitmq_zocalo_vhost;
 
         if (!$this->has_arg('PROCESSINGJOBID')) $this->_error('No processing job specified');
 
@@ -379,7 +379,7 @@ function _enqueue()
                 'ispyb_process' => intval($this->arg('PROCESSINGJOBID')),
             )
         );
-        $this->_send_zocalo_message($zocalo_mx_reprocess_queue, $message);
+        $this->_send_zocalo_message($rabbitmq_zocalo_vhost, $message);
 
         $this->_output(new \stdClass);
     }
diff --git a/api/src/Queue.php b/api/src/Queue.php
index 44b334099..4440d45a7 100644
--- a/api/src/Queue.php
+++ b/api/src/Queue.php
@@ -2,42 +2,34 @@
 
 namespace SynchWeb;
 
-use Stomp\Exception\StompException;
-use Stomp\Stomp;
+use PhpAmqpLib\Connection\AMQPStreamConnection;
+use PhpAmqpLib\Message\AMQPMessage;
 
 class Queue
 {
-    private $server, $username, $password;
+    private $host, $port, $username, $password, $vhost;
 
-    function __construct($server, $username, $password)
+    function __construct($host, $port, $username, $password, $vhost)
     {
-        $this->server = $server;
+        $this->host = $host;
+        $this->port = $port;
         $this->username = $username;
         $this->password = $password;
+        $this->vhost = $vhost;
     }
 
-    function send($queue, array $message, $persistent = false, $login = null)
+    function send(array $message, $routing_key)
     {
-        try {
-            $connection = new Stomp($this->server);
-
-            $connection->connect($this->username, $this->password);
-
-            $connection->send(
-                $queue,
-                json_encode($message, JSON_UNESCAPED_SLASHES),
-                array(
-                    'persistent' => ($persistent === true),
-                    'synchweb.host' => gethostname(),
-                    'synchweb.user' => $login,
-                )
-            );
-
-            $connection->disconnect();
-        } catch (StompException $e) {
-            /** @noinspection PhpUnhandledExceptionInspection */
-
-            throw $e;
-        }
+        $connection = new AMQPStreamConnection($this->host, $this->port, $this->username, $this->password, $this->vhost);
+        $channel = $connection->channel();
+
+        $msg = new AMQPMessage(
+            json_encode($message, JSON_UNESCAPED_SLASHES)
+        );
+
+        $channel->basic_publish($msg, null, $routing_key);
+
+        $channel->close();
+        $connection->close();
     }
 }