diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6496088..fb2eeff 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [3.0.1] - 2026-05-30
+
+### Fixed
+
+- Improved type safety in `formatHijriDate`: explicit return type annotation on `replace` callback and non-null assertions on array lookups with JSDoc justification comments.
+- Added in-code comment blocks to all source modules documenting purpose, inputs, outputs, constraints, and SPORT references.
+
 ## [3.0.0] - 2026-05-28
 
 ### Changed
diff --git a/package.json b/package.json
index 1503f26..be6bc17 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "luxon-hijri",
-  "version": "3.0.0",
+  "version": "3.0.1",
   "description": "Hijri/Gregorian date conversion and formatting using the Umm al-Qura calendar. Built on Luxon. Supports toHijri, toGregorian, formatHijriDate, and isValidHijriDate.",
   "author": "Aric Camarata",
   "license": "MIT",