diff --git a/doc/security.md b/doc/security.md
index 8eedf9e604c..b762e8b9523 100644
--- a/doc/security.md
+++ b/doc/security.md
@@ -54,6 +54,7 @@ The following sample code authenticates as an installation using [lcobucci/jwt](
 to generate a JSON Web Token (JWT).
 
 ```php
+use Http\Adapter\Guzzle6\Client as GuzzleClient;
 use Lcobucci\JWT\Builder;
 use Lcobucci\JWT\Signer\Key;
 use Lcobucci\JWT\Signer\Rsa\Sha256;