diff --git a/CHANGELOG.md b/CHANGELOG.md
index 05eb749..4980ab4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -40,5 +40,5 @@ and this project adheres to [Semantic Versioning](https://semver.org/).
 - Todo display
 - i18n support (English, Japanese)
 
-[Unreleased]: https://github.com/ktmage/OpenCodeGUI/compare/v0.1.0...HEAD
-[0.1.0]: https://github.com/ktmage/OpenCodeGUI/releases/tag/v0.1.0
+[Unreleased]: https://github.com/ktmage/opencode-gui/compare/v0.1.0...HEAD
+[0.1.0]: https://github.com/ktmage/opencode-gui/releases/tag/v0.1.0
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 0736a9b..2cb435d 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -29,8 +29,8 @@ This project itself is developed primarily through AI-assisted coding, and we we
 #### Setup
 
 ```sh
-git clone https://github.com/<your-fork>/OpenCodeGUI.git
-cd OpenCodeGUI
+git clone https://github.com/<your-fork>/opencode-gui.git
+cd opencode-gui
 npm install
 npm run build
 ```
@@ -45,7 +45,7 @@ npm test
 
 #### Reporting Bugs / Requesting Features
 
-Opening an issue before starting work is recommended. Use the provided [issue templates](https://github.com/ktmage/OpenCodeGUI/issues/new/choose).
+Opening an issue before starting work is recommended. Use the provided [issue templates](https://github.com/ktmage/opencode-gui/issues/new/choose).
 
 For small fixes (typos, documentation improvements), you may open a PR directly.
 
@@ -112,8 +112,8 @@ By submitting a pull request, you agree that your contributions are licensed und
 #### セットアップ
 
 ```sh
-git clone https://github.com/<your-fork>/OpenCodeGUI.git
-cd OpenCodeGUI
+git clone https://github.com/<your-fork>/opencode-gui.git
+cd opencode-gui
 npm install
 npm run build
 ```
@@ -128,7 +128,7 @@ npm test
 
 #### バグ報告・機能リクエスト
 
-作業を開始する前に Issue を立てることを推奨します。[Issue テンプレート](https://github.com/ktmage/OpenCodeGUI/issues/new/choose)を利用してください。
+作業を開始する前に Issue を立てることを推奨します。[Issue テンプレート](https://github.com/ktmage/opencode-gui/issues/new/choose)を利用してください。
 
 小さな修正（typo、ドキュメント改善など）は直接 PR を出しても構いません。
 
diff --git a/package.json b/package.json
index 56439cd..0d1d6b2 100644
--- a/package.json
+++ b/package.json
@@ -7,11 +7,11 @@
   "license": "MIT",
   "repository": {
     "type": "git",
-    "url": "https://github.com/ktmage/OpenCodeGUI"
+    "url": "https://github.com/ktmage/opencode-gui"
   },
-  "homepage": "https://github.com/ktmage/OpenCodeGUI#readme",
+  "homepage": "https://github.com/ktmage/opencode-gui#readme",
   "bugs": {
-    "url": "https://github.com/ktmage/OpenCodeGUI/issues"
+    "url": "https://github.com/ktmage/opencode-gui/issues"
   },
   "keywords": [
     "opencode",