diff --git a/index.html b/index.html
index c770c9e..3291d19 100644
--- a/index.html
+++ b/index.html
@@ -429,7 +429,7 @@ header{display:flex;align-items:center;justify-content:space-between;padding:0 1
         <!-- Exam tips -->
         <div class="card" x-show="currentUnit?.examtips?.length" style="border-color:rgba(248,113,113,.18);background:rgba(248,113,113,.03)">
           <div class="card-title" style="color:var(--err)">
-            <i data-lucide="triangle-alert" style="width:13px;height:13px;color:var(--err)"></i>
+            <i data-lucide="alert-triangle" style="width:13px;height:13px;color:var(--err)"></i>
             試験対策メモ
           </div>
           <template x-for="tip in (currentUnit?.examtips||[])" :key="tip">
@@ -459,7 +459,7 @@ header{display:flex;align-items:center;justify-content:space-between;padding:0 1
         <div class="card" x-show="currentUnit?.quiz?.length">
           <div class="quiz-header">
             <div class="quiz-title-label">
-              <i data-lucide="circle-check-big" style="width:13px;height:13px"></i>
+              <i data-lucide="check-circle-2" style="width:13px;height:13px"></i>
               理解度チェック
             </div>
             <div class="quiz-score-lbl" x-text="scoreLabel"></div>
diff --git a/sw.js b/sw.js
index 6705919..ce64ae2 100644
--- a/sw.js
+++ b/sw.js
@@ -1,5 +1,5 @@
 // posimai-boki SW — stale-while-revalidate + skipWaiting
-const CACHE = 'posimai-boki-v4';
+const CACHE = 'posimai-boki-v5';
 const STATIC = ['/', '/index.html', '/manifest.json', '/logo.png'];
 
 self.addEventListener('install', e => {