diff --git a/types/webappsec-credential-management/index.d.ts b/types/webappsec-credential-management/index.d.ts
index ba9058a9a0..a0498f34af 100644
--- a/types/webappsec-credential-management/index.d.ts
+++ b/types/webappsec-credential-management/index.d.ts
@@ -2,7 +2,7 @@
 // Project: https://github.com/w3c/webappsec-credential-management
 // Definitions by: Iain McGinniss <https://github.com/iainmcgin>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-// TypeScript Version: 2.2
+// TypeScript Version: 2.7
 
 // Spec: https://www.w3.org/TR/2017/WD-credential-management-1-20170804
 
@@ -317,6 +317,11 @@ interface CredentialRequestOptions {
      * This property specifies options for requesting a public-key signature.
      */
     publicKey?: PublicKeyCredentialRequestOptions;
+
+    /**
+     * This property lets the developer abort an ongoing get() operation.
+     */
+    signal?: AbortSignal;
 }
 
 /**
@@ -345,6 +350,10 @@ interface CredentialCreationOptions {
      * @see {@link https://w3c.github.io/webauthn/#dictionary-makecredentialoptions}
      */
     publicKey?: PublicKeyCredentialCreationOptions;
+    /**
+     * @see {@link https://w3c.github.io/webappsec-credential-management/#dom-credentialrequestoptions-signal}
+     */
+    signal?: AbortSignal;
 }
 
 /**