 <p>I found a simple trick. You can pass in headers object and update its pointer value.</p> <pre><code>const headers = { Authorization: '', }; Relay.injectNetworkLayer( new Relay.DefaultNetworkLayer('http://example.com/graphql', { headers: headers, }) ); // To update the authorization, set the field. headers.Authorization = 'Basic SSdsbCBmaW5kIHNvbWV0aGluZyB0byBwdXQgaGVyZQ==' </code></pre>