diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3bfe897..401b554 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [0.34.1](https://github.com/grain-lang/binaryen.ml/compare/v0.34.0...v0.34.1) (2025-12-21)
+
+
+### Bug Fixes
+
+* Use `caml_uint8_array_of_string` in add_custom_section ([#269](https://github.com/grain-lang/binaryen.ml/issues/269)) ([0877b1e](https://github.com/grain-lang/binaryen.ml/commit/0877b1e2b8fb1df4ddb29c73bbb867875fa5f580))
+
 ## [0.34.0](https://github.com/grain-lang/binaryen.ml/compare/v0.33.0...v0.34.0) (2025-11-12)
 
 
diff --git a/binaryen.opam b/binaryen.opam
index 0591f42..9c0bf5d 100644
--- a/binaryen.opam
+++ b/binaryen.opam
@@ -1,5 +1,5 @@
 opam-version: "2.0"
-version: "0.34.0"
+version: "0.34.1"
 synopsis: "OCaml bindings for Binaryen"
 maintainer: "oscar@grain-lang.org"
 author: "Oscar Spencer"
diff --git a/package.json b/package.json
index b0727de..dcf71e3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@grain/binaryen.ml",
-  "version": "0.34.0",
+  "version": "0.34.1",
   "description": "OCaml bindings for Binaryen.",
   "author": "Oscar Spencer <oscar@grain-lang.org>",
   "license": "Apache-2.0",