diff --git a/src/Application/Client.php b/src/Application/Client.php
index c5ad8e2..ccc7b04 100644
--- a/src/Application/Client.php
+++ b/src/Application/Client.php
@@ -93,6 +93,6 @@ public function run($args): void
     protected function showHelp($message): void
     {
         print "\n[error] " . $message . "\n\nUsage:\n";
-        print "nostr-php --content \"Hello world!\" --key /home/path/to/nostr-private.key --relay wss://nostr.pleb.network\n\n";
+        print "bin/nostr-php --content \"Hello world!\" --key /home/path/to/nostr-private.key --relay wss://nostr.pleb.network\n\n";
     }
 }
diff --git a/src/Relay/Relay.php b/src/Relay/Relay.php
index 93ebe9a..74fa7c0 100644
--- a/src/Relay/Relay.php
+++ b/src/Relay/Relay.php
@@ -38,9 +38,13 @@ class Relay implements RelayInterface
      * @param string $websocket
      *   The socket URL.
      */
-    public function __construct(string $websocket)
+    public function __construct(string $websocket, MessageInterface $message = null)
     {
         $this->url = $websocket;
+        // Backwards compatibility for version <1.2.4
+        if ($message !== null) {
+            $this->setMessage($message);
+        }
     }
 
     /**
@@ -87,7 +91,7 @@ public function send(): CommandResultInterface
             $client->text($this->payload);
             $response = $client->receive();
             $client->disconnect();
-            $response = json_decode($response);
+            $response = json_decode($response->getContent());
             if ($response[0] === 'NOTICE') {
                 throw new \RuntimeException($response[1]);
             }