diff --git a/src/Keycloak.php b/src/Keycloak.php
index d2500497..223a2143 100755
--- a/src/Keycloak.php
+++ b/src/Keycloak.php
@@ -37,7 +37,7 @@ public function __construct(
          *
          * @var Client
          */
-        private Client $httpClient,
+        private ?Client $httpClient,
 
         /**
          * The base URL for Keycloak.