diff --git a/src/HttpClientBuilder.php b/src/HttpClientBuilder.php
index 41afbd68..6ae03abf 100644
--- a/src/HttpClientBuilder.php
+++ b/src/HttpClientBuilder.php
@@ -55,7 +55,7 @@ public function __construct()
         $this->followRedirectsInterceptor = new FollowRedirects(10);
         $this->retryInterceptor = new RetryRequests(2);
         $this->defaultAcceptInterceptor = new SetRequestHeaderIfUnset('accept', '*/*');
-        $this->defaultUserAgentInterceptor = new SetRequestHeaderIfUnset('user-agent', 'amphp/http-client @ v5.x');
+        $this->defaultUserAgentInterceptor = new SetRequestHeaderIfUnset('user-agent', 'amphp/http-client/5.x');
         $this->defaultCompressionHandler = new DecompressResponse;
     }
 
diff --git a/test/ClientHttpBinIntegrationTest.php b/test/ClientHttpBinIntegrationTest.php
index 75931eed..da6dd9ff 100644
--- a/test/ClientHttpBinIntegrationTest.php
+++ b/test/ClientHttpBinIntegrationTest.php
@@ -155,7 +155,7 @@ public function testDefaultUserAgentSent(): void
         $body = $response->getBody()->buffer();
         $result = \json_decode($body, true);
 
-        self::assertSame('amphp/http-client @ v5.x', $result['user-agent']);
+        self::assertSame('amphp/http-client/5.x', $result['user-agent']);
     }
 
     public function testDefaultUserAgentCanBeChanged(): void
@@ -206,7 +206,7 @@ public function testHeaderCase(): void
         self::assertSame([
             ['tEst', 'test'],
             ['accept', '*/*'],
-            ['user-agent', 'amphp/http-client @ v5.x'],
+            ['user-agent', 'amphp/http-client/5.x'],
             ['Accept-Encoding', 'gzip, deflate, identity'],
             ['host', (string) $this->socket->getAddress()],
         ], $result);