diff --git a/README.ja.md b/README.ja.md
index f8ab9e8..380d3e3 100644
--- a/README.ja.md
+++ b/README.ja.md
@@ -1,5 +1,9 @@
 # Vix.cpp
 
+<p align="center">
+  <a href="README.md">English</a> | <strong>日本語</strong>
+</p>
+
 <p align="center" style="margin:0;">
   <img 
     src="https://res.cloudinary.com/dwjbed2xb/image/upload/v1762524350/vixcpp_etndhz.png" 
@@ -28,8 +32,6 @@
 
 **Vix** は、次世代の **オフラインファースト・ピアツーピア・超高速 C++ モダンランタイム**です。
 
-[English](README.md)
-
 目標は明確です。
 
 > **Node / Deno / Bun のようなアプリを実行でき、  
diff --git a/README.md b/README.md
index f87f76d..3ee3676 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,9 @@
 # Vix.cpp
 
+<p align="center">
+  <strong>English</strong> | <a href="README.ja.md">日本語</a>
+</p>
+
 <p align="center" style="margin:0;">
   <img 
     src="https://res.cloudinary.com/dwjbed2xb/image/upload/v1762524350/vixcpp_etndhz.png" 
@@ -28,8 +32,6 @@
 
 **Vix** is a next-generation **offline-first, peer-to-peer, ultra-fast runtime for modern C++**.
 
-[Japanese](README.ja.md)
-
 Its goal is clear:
 
 > **A runtime capable of running apps like Node / Deno / Bun —  
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..ad77418
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,6 @@
+{
+  "name": "vix",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {}
+}