diff --git a/CHANGELOG.md b/CHANGELOG.md
index a3ada92..643293e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,12 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [1.0.3] - 2026-06-10
 
 ### Fixed
 - Date handed to hijri-core is now built via `Date.UTC()` to match hijri-core's UTC-day
   contract; fixes previous-day results on east-of-UTC hosts (e.g. UTC+5, UTC+8).
-  Lock-step: requires the matching unreleased hijri-core fix (`fix/utc-day-boundary`).
+  Requires hijri-core 1.0.3.
 
 ## [1.0.2] - 2026-05-30
 
diff --git a/package.json b/package.json
index b2a24f1..920b62e 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "temporal-hijri",
-  "version": "1.0.2",
+  "version": "1.0.3",
   "description": "Temporal Calendar Protocol implementation for the Hijri calendar system. Supports Umm al-Qura and FCNA calendars via hijri-core.",
   "author": "Aric Camarata",
   "license": "MIT",
@@ -75,7 +75,7 @@
     "c8": "^11.0.0",
     "eslint": "^10.0.3",
     "eslint-config-prettier": "^10.1.8",
-    "hijri-core": "^1.0.0",
+    "hijri-core": "^1.0.3",
     "prettier": "^3.8.1",
     "tsup": "^8.0.0",
     "typedoc": "^0.28.19",