diff --git a/doc/api/webcrypto.md b/doc/api/webcrypto.md
index 0604f0164d422a..8cf4bad3f823d5 100644
--- a/doc/api/webcrypto.md
+++ b/doc/api/webcrypto.md
@@ -689,7 +689,7 @@ changes:
 
 * `format`: {string} Must be one of `'raw'`, `'pkcs8'`, `'spki'`, or `'jwk'`.
 * `key`: {CryptoKey}
-* Returns: {Promise} containing {ArrayBuffer}.
+* Returns: {Promise} containing {ArrayBuffer|Object}.
 
 Exports the given key into the specified format, if supported.
 
@@ -776,7 +776,7 @@ changes:
 -->
 
 * `format`: {string} Must be one of `'raw'`, `'pkcs8'`, `'spki'`, or `'jwk'`.
-* `keyData`: {ArrayBuffer|TypedArray|DataView|Buffer|KeyObject}
+* `keyData`: {ArrayBuffer|TypedArray|DataView|Buffer|Object}
 
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