diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9cef5f459..ab104624b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,8 @@
 # Changelog
 
+## 0.9.1 (2024-06-24) - `utils/core` crate only
+- Fixed `useize` serialization in `ByteWriter`.
+
 ## 0.9.0 (2024-05-09)
 - [BREAKING] Merged `TraceLayout` into `TraceInfo` (#245).
 - Implemented Lagrange Kernel constraints (#247, )
diff --git a/utils/core/Cargo.toml b/utils/core/Cargo.toml
index 44dd58b61..7f30026d9 100644
--- a/utils/core/Cargo.toml
+++ b/utils/core/Cargo.toml
@@ -1,12 +1,12 @@
 [package]
 name = "winter-utils"
-version = "0.9.0"
+version = "0.9.1"
 description = "Utilities for the Winterfell STARK prover/verifier"
 authors = ["winterfell contributors"]
 readme = "README.md"
 license = "MIT"
 repository = "https://github.com/novifinancial/winterfell"
-documentation = "https://docs.rs/winter-utils/0.9.0"
+documentation = "https://docs.rs/winter-utils/0.9.1"
 categories = ["cryptography", "no-std"]
 keywords = ["serialization", "transmute"]
 edition = "2021"