diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 710b5b8..f5c1d5d 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -39,7 +39,7 @@ jobs:
     needs: [ install_dependencies ]
     strategy:
       matrix:
-        php-versions: [ "7.4", "8.0", "8.1", "8.2" ]
+        php-versions: [ "7.4", "8.0", "8.1", "8.2", "8.3" ]
 
     runs-on: ubuntu-latest
 
@@ -69,4 +69,4 @@ jobs:
         run: composer install --prefer-dist --no-progress
 
       - name: Run test suite
-        run: composer run-script test
\ No newline at end of file
+        run: composer run-script test
diff --git a/src/Connection.php b/src/Connection.php
index 7c1c85b..1fec7d5 100644
--- a/src/Connection.php
+++ b/src/Connection.php
@@ -33,7 +33,7 @@ class Connection
 
     private const TOKEN_URL = '/oauth/token';
 
-    private const VERSION = '1.0.1';
+    private const VERSION = '1.0.2';
 
     /** @var Client|null */
     private ?Client $client = null;
@@ -59,6 +59,9 @@ class Connection
     /** @var string The URL as configured with the OAuth client */
     private string $redirectUrl;
 
+    /** @var string The appendix for the user agent */
+    private string $userAgentAppendix = '';
+
     /** @var mixed */
     private $state = null;
 
@@ -87,12 +90,14 @@ public function getClient(): Client
             $userAgent .= ' OAuth/2.0';
         }
 
+        $userAgent .= " {$this->userAgentAppendix}";
+
         $this->client = new Client([
             'http_errors' => true,
             'expect' => false,
             'base_uri' => self::BASE_URL,
             'headers' => [
-                'User-Agent' => $userAgent,
+                'User-Agent' => trim($userAgent),
             ]
         ]);
 
@@ -107,6 +112,17 @@ public function setClient(Client $client): void
         $this->client = $client;
     }
 
+    /**
+     * @param string $userAgentAppendix
+     * @return Connection
+     */
+    public function setUserAgentAppendix(string $userAgentAppendix): Connection
+    {
+        $this->userAgentAppendix = $userAgentAppendix;
+
+        return $this;
+    }
+
     /**
      * @param string $clientId
      * @return Connection
diff --git a/tests/ConnectionTest.php b/tests/ConnectionTest.php
index 1ac7589..8adcff4 100644
--- a/tests/ConnectionTest.php
+++ b/tests/ConnectionTest.php
@@ -23,7 +23,15 @@ public function testUserAgentIsSet(): void
         $connection = new Connection();
 
         $this->assertEquals(
-            sprintf('Sendy/1.0.1 PHP/%s', phpversion()),
+            sprintf('Sendy/1.0.2 PHP/%s', phpversion()),
+            $connection->getClient()->getConfig('headers')['User-Agent']
+        );
+
+        $connection = new Connection();
+        $connection->setUserAgentAppendix('WooCommerce/6.2');
+
+        $this->assertEquals(
+            sprintf('Sendy/1.0.2 PHP/%s WooCommerce/6.2', phpversion()),
             $connection->getClient()->getConfig('headers')['User-Agent']
         );
 
@@ -31,7 +39,7 @@ public function testUserAgentIsSet(): void
         $connection->setOauthClient(true);
 
         $this->assertEquals(
-            sprintf('Sendy/1.0.1 PHP/%s OAuth/2.0', phpversion()),
+            sprintf('Sendy/1.0.2 PHP/%s OAuth/2.0', phpversion()),
             $connection->getClient()->getConfig('headers')['User-Agent']
         );
     }