diff --git a/src/clients/constantcontact/provider/ConstantContact.php b/src/clients/constantcontact/provider/ConstantContact.php
index e125daf..0bf95e9 100644
--- a/src/clients/constantcontact/provider/ConstantContact.php
+++ b/src/clients/constantcontact/provider/ConstantContact.php
@@ -35,6 +35,11 @@ protected function getScopeSeparator(): string
         return ' ';
     }
 
+    protected function getAuthorizationHeaders($token = null): array
+    {
+        return ['Authorization' => 'Bearer ' . $token->getToken()];
+    }
+
     public function checkResponse(ResponseInterface $response, $data)
     {
         if (!empty($data['errors'])) {