diff --git a/types/nodegit/cert-x509.d.ts b/types/nodegit/cert-x509.d.ts
index 14f38ac5fc..dd395a755d 100644
--- a/types/nodegit/cert-x509.d.ts
+++ b/types/nodegit/cert-x509.d.ts
@@ -1,5 +1,25 @@
+import { Cert } from './cert';
+
 export class CertX509 {
-    certType: number;
+    /**
+     *
+     *
+     * @type {Buffer}
+     * @memberof CertX509
+     */
     data: Buffer;
+    /**
+     *
+     *
+     * @type {number}
+     * @memberof CertX509
+     */
     len: number;
+    /**
+     *
+     *
+     * @type {Cert}
+     * @memberof CertX509
+     */
+    parent: Cert;
 }