diff --git a/src/ic-certified-assets/CHANGELOG.md b/src/ic-certified-assets/CHANGELOG.md
index d8e93749c..542c06eae 100644
--- a/src/ic-certified-assets/CHANGELOG.md
+++ b/src/ic-certified-assets/CHANGELOG.md
@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.2.4] - 2022-07-12
+### Fixed
+- headers field in Candid spec accepts mmultiple HTTP headers
+
 ## [0.2.3] - 2022-07-06
 ### Added
 - Support for setting custom HTTP headers on asset creation 
diff --git a/src/ic-certified-assets/Cargo.toml b/src/ic-certified-assets/Cargo.toml
index c146a2681..aa47a4379 100644
--- a/src/ic-certified-assets/Cargo.toml
+++ b/src/ic-certified-assets/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ic-certified-assets"
-version = "0.2.3"
+version = "0.2.4"
 edition = "2021"
 authors = ["DFINITY Stiftung <sdk@dfinity.org>"]
 description = "Rust support for asset certification."
diff --git a/src/ic-certified-assets/assets.did b/src/ic-certified-assets/assets.did
index deaa63fce..791de3751 100644
--- a/src/ic-certified-assets/assets.did
+++ b/src/ic-certified-assets/assets.did
@@ -7,7 +7,7 @@ type CreateAssetArguments = record {
   key: Key;
   content_type: text;
   max_age: opt nat64;
-  headers: opt HeaderField;
+  headers: opt vec HeaderField;
 };
 
 // Add or change content for an asset, by content encoding