diff --git a/public/base-light.html b/public/base-light.html
index 310586c..fc9e2bb 100644
--- a/public/base-light.html
+++ b/public/base-light.html
@@ -35,7 +35,7 @@
                 <p class="hide show-on-medium show-on-large">{% block header_desc %}<a href="/daily-quote/" class="text-no-decoration">{{ get_daily_quote() }}</a>{% endblock %}</p>
             </div>
             <div class="flex">
-                <a href="?lightweight=0" class="text-no-decoration hide show-on-small text-bright-blue">Lightweight Mode</a>
+                <a href="?lightweight=0" class="text-no-decoration hide show-on-small bold-on-small text-bright-blue">Lightweight Mode</a>
                 <a href="/access-counter/" class="text-no-decoration hide show-on-medium show-on-large">あなたは{{ get_access_count() }}番目の訪問者です。</a>
             </div>
         </header>
diff --git a/public/base.html b/public/base.html
index 4d8f9a9..0b356fb 100644
--- a/public/base.html
+++ b/public/base.html
@@ -57,7 +57,7 @@
                 <p class="hide show-on-medium show-on-large">{% block header_desc %}<a href="/daily-quote/" class="text-no-decoration">{{ get_daily_quote() }}</a>{% endblock %}</p>
             </div>
             <div class="flex">
-                <a href="?lightweight=1" class="text-no-decoration hide show-on-small">Lightweight Mode</a>
+                <a href="?lightweight=1" class="text-no-decoration hide show-on-small bold-on-small">Lightweight Mode</a>
                 <a href="/access-counter/" class="text-no-decoration hide show-on-medium show-on-large">あなたは{{ get_access_count() }}番目の訪問者です。</a>
             </div>
         </header>