diff --git a/CHANGELOG.md b/CHANGELOG.md
index 379812d..51b1a7c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## unreleased
 
+## 0.4.2 - 2024-10-19
+
 ### Changed
 
  - Do not extract operands from calls to primitive operations like `+` (issue https://github.com/mazeppa-dev/mazeppa/issues/24).
diff --git a/bin/main.ml b/bin/main.ml
index 82152cc..68fdd39 100644
--- a/bin/main.ml
+++ b/bin/main.ml
@@ -4,7 +4,7 @@ open Ppx_yojson_conv_lib.Yojson_conv.Primitives
 
 let github_repo = "https://github.com/mazeppa-dev/mazeppa"
 
-let version = "0.4.1"
+let version = "0.4.2"
 
 let tab = "    "
 
diff --git a/dune-project b/dune-project
index 2027942..ef29281 100644
--- a/dune-project
+++ b/dune-project
@@ -4,7 +4,7 @@
 
 (name mazeppa)
 
-(version 0.4.1)
+(version 0.4.2)
 
 (generate_opam_files true)
 
diff --git a/mazeppa.opam b/mazeppa.opam
index 7d43b65..ad553a4 100644
--- a/mazeppa.opam
+++ b/mazeppa.opam
@@ -1,6 +1,6 @@
 # This file is generated by dune, edit dune-project instead
 opam-version: "2.0"
-version: "0.4.1"
+version: "0.4.2"
 synopsis: "A modern supercompiler for call-by-value functional languages"
 maintainer: ["Lewis Pearson <hirrolot@gmail.com>"]
 authors: ["Lewis Pearson <hirrolot@gmail.com>"]