diff --git a/CHANGELOG.md b/CHANGELOG.md
index 47874b6..3bb74a4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,11 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/).
 
 ## [Unreleased]
 
+## [0.3.1] - 2026-04-16
+
 ### Added
 
-- `--version` / `-V` flag prints the CLI version (e.g. `mmcif-dict 0.3.0`) and
+- `--version` / `-V` flag prints the CLI version (e.g. `mmcif-dict 0.3.1`) and
   exits; the version is sourced from `build.zig.zon` via a build option so it
-  stays in sync with the release automatically (#36)
+  stays in sync with the release automatically (#37)
 
 ## [0.3.0] - 2026-04-16
 
diff --git a/build.zig.zon b/build.zig.zon
index 1ab6bf1..30567f0 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -9,7 +9,7 @@
     .name = .mmcif_dict_cli,
     // This is a [Semantic Version](https://semver.org/).
     // In a future version of Zig it will be used for package deduplication.
-    .version = "0.3.0",
+    .version = "0.3.1",
     // Together with name, this represents a globally unique package
     // identifier. This field is generated by the Zig toolchain when the
     // package is first created, and then *never changes*. This allows