diff --git a/index-b.html b/index-b.html
index 546032d..ab54842 100644
--- a/index-b.html
+++ b/index-b.html
@@ -871,7 +871,7 @@
                     今後の新機能も含む
                 </li>
             </ul>
-            <a href="https://buy.stripe.com/test_9B67sEbN3fowfMW4jwenS00" class="btn-full btn-accent" target="_blank" rel="noopener">
+            <a href="https://buy.stripe.com/test_9B67sEbN3fowfMW4jwenS00" class="btn-full btn-accent" target="_blank" rel="noopener noreferrer">
                 <i data-lucide="credit-card" style="width:15px;height:15px;"></i>
                 ¥500 で購入する
             </a>
@@ -895,9 +895,9 @@
     <div class="footer-inner">
         <div class="footer-copy">&copy; 2026 Posimai</div>
         <div class="footer-links">
-            <a href="https://posimai.soar-enrich.com/legal/privacy" target="_blank" rel="noopener">プライバシーポリシー</a>
-            <a href="https://posimai.soar-enrich.com/legal/terms" target="_blank" rel="noopener">利用規約</a>
-            <a href="https://posimai.soar-enrich.com/legal/tokusho" target="_blank" rel="noopener">特定商取引法に基づく表記</a>
+            <a href="https://posimai.soar-enrich.com/legal/privacy" target="_blank" rel="noopener noreferrer">プライバシーポリシー</a>
+            <a href="https://posimai.soar-enrich.com/legal/terms" target="_blank" rel="noopener noreferrer">利用規約</a>
+            <a href="https://posimai.soar-enrich.com/legal/tokusho" target="_blank" rel="noopener noreferrer">特定商取引法に基づく表記</a>
         </div>
     </div>
 </footer>
diff --git a/index-c.html b/index-c.html
index b74016e..519c6ee 100644
--- a/index-c.html
+++ b/index-c.html
@@ -308,7 +308,7 @@
         <span class="amount">500</span>
     </div>
     <p class="hero-price-note">買い切り — 追加請求なし</p>
-    <a class="btn-buy" href="https://buy.stripe.com/test_9B67sEbN3fowfMW4jwenS00" id="buyBtn" target="_blank" rel="noopener">
+    <a class="btn-buy" href="https://buy.stripe.com/test_9B67sEbN3fowfMW4jwenS00" id="buyBtn" target="_blank" rel="noopener noreferrer">
         <i data-lucide="credit-card" style="width:16px;height:16px;"></i>
         購入する
     </a>
@@ -419,9 +419,9 @@
 <div class="divider"></div>
 
 <footer>
-    <a href="https://posimai.soar-enrich.com/legal/tokusho" target="_blank" rel="noopener">特定商取引法</a>
-    <a href="https://posimai.soar-enrich.com/legal/privacy" target="_blank" rel="noopener">プライバシーポリシー</a>
-    <a href="https://posimai.soar-enrich.com/legal/terms" target="_blank" rel="noopener">利用規約</a>
+    <a href="https://posimai.soar-enrich.com/legal/tokusho" target="_blank" rel="noopener noreferrer">特定商取引法</a>
+    <a href="https://posimai.soar-enrich.com/legal/privacy" target="_blank" rel="noopener noreferrer">プライバシーポリシー</a>
+    <a href="https://posimai.soar-enrich.com/legal/terms" target="_blank" rel="noopener noreferrer">利用規約</a>
 </footer>
 
 <script>
diff --git a/index-d.html b/index-d.html
index e040f7d..32d38a9 100644
--- a/index-d.html
+++ b/index-d.html
@@ -640,7 +640,7 @@
                 <div class="plan-label">フルアクセス</div>
                 <div class="plan-price"><sup>¥</sup>500</div>
                 <div class="plan-note">記録無制限・AI機能・買い切り</div>
-                <a href="https://buy.stripe.com/test_9B67sEbN3fowfMW4jwenS00" class="btn btn-primary" target="_blank" rel="noopener">
+                <a href="https://buy.stripe.com/test_9B67sEbN3fowfMW4jwenS00" class="btn btn-primary" target="_blank" rel="noopener noreferrer">
                     <i data-lucide="credit-card" style="width:13px;height:13px;"></i>
                     購入する
                 </a>
@@ -817,9 +817,9 @@
             Posimai
         </div>
         <div class="footer-links">
-            <a href="https://posimai.soar-enrich.com/legal/privacy" target="_blank" rel="noopener">プライバシーポリシー</a>
-            <a href="https://posimai.soar-enrich.com/legal/terms" target="_blank" rel="noopener">利用規約</a>
-            <a href="https://posimai.soar-enrich.com/legal/tokusho" target="_blank" rel="noopener">特定商取引法</a>
+            <a href="https://posimai.soar-enrich.com/legal/privacy" target="_blank" rel="noopener noreferrer">プライバシーポリシー</a>
+            <a href="https://posimai.soar-enrich.com/legal/terms" target="_blank" rel="noopener noreferrer">利用規約</a>
+            <a href="https://posimai.soar-enrich.com/legal/tokusho" target="_blank" rel="noopener noreferrer">特定商取引法</a>
         </div>
     </div>
 </footer>
diff --git a/index.html b/index.html
index 7041ffe..2113903 100644
--- a/index.html
+++ b/index.html
@@ -437,7 +437,7 @@
     </div>
     <div class="nav-links">
         <a href="#apps">Apps</a>
-        <a href="https://posimai.soar-enrich.com" target="_blank" rel="noopener">Dashboard</a>
+        <a href="https://posimai.soar-enrich.com" target="_blank" rel="noopener noreferrer">Dashboard</a>
     </div>
 </nav>
 
@@ -508,7 +508,7 @@
                 <div class="tier-name">Full Access</div>
                 <div class="tier-price"><sup>¥</sup>500</div>
                 <div class="tier-desc">記録無制限・AI分析・全機能。買い切り。</div>
-                <a href="https://buy.stripe.com/test_9B67sEbN3fowfMW4jwenS00" class="btn btn-primary" id="buyBtn" target="_blank" rel="noopener">
+                <a href="https://buy.stripe.com/test_9B67sEbN3fowfMW4jwenS00" class="btn btn-primary" id="buyBtn" target="_blank" rel="noopener noreferrer">
                     <i data-lucide="credit-card" style="width:14px;height:14px;"></i>
                     購入する
                 </a>
@@ -579,9 +579,9 @@
             &copy; 2026 Posimai
         </div>
         <div class="footer-links">
-            <a href="https://posimai.soar-enrich.com/legal/privacy" target="_blank" rel="noopener">プライバシーポリシー</a>
-            <a href="https://posimai.soar-enrich.com/legal/terms" target="_blank" rel="noopener">利用規約</a>
-            <a href="https://posimai.soar-enrich.com/legal/tokusho" target="_blank" rel="noopener">特定商取引法</a>
+            <a href="https://posimai.soar-enrich.com/legal/privacy" target="_blank" rel="noopener noreferrer">プライバシーポリシー</a>
+            <a href="https://posimai.soar-enrich.com/legal/terms" target="_blank" rel="noopener noreferrer">利用規約</a>
+            <a href="https://posimai.soar-enrich.com/legal/tokusho" target="_blank" rel="noopener noreferrer">特定商取引法</a>
         </div>
     </div>
 </footer>