diff --git a/src/crypto/hash/index.js b/src/crypto/hash/index.js
index bbb977b3..97f9eb28 100644
--- a/src/crypto/hash/index.js
+++ b/src/crypto/hash/index.js
@@ -106,7 +106,7 @@ export default {
    * Create a hash on the specified data using the specified algorithm
    * @param {module:enums.hash} algo Hash algorithm type (see {@link https://tools.ietf.org/html/rfc4880#section-9.4|RFC 4880 9.4})
    * @param {Uint8Array} data Data to be hashed
-   * @returns {Uint8Array} hash value
+   * @returns {Promise<Uint8Array>} hash value
    */
   digest: function(algo, data) {
     switch (algo) {