diff --git a/settings.html b/settings.html
index 209b180fa..db6c57fbd 100644
--- a/settings.html
+++ b/settings.html
@@ -115,35 +115,35 @@
     <div class='message-ttl-setting'>
       <h3>{{ messageTTL }}</h3>
       <div>{{ messageTTLSettingDescription }}</div>
-      <div id="warning">{{ messageTTLSettingWarning }}</div>
+      <div id='warning'>{{ messageTTLSettingWarning }}</div>
       <div class='inputs'>
         <input
           name='message-ttl-setting'
           id='message-ttl-setting'
-          type="range"
-          list="tickmarks"
-          min="12"
-          max="96"
-          step="6"
-          value="24"
+          type='range'
+          list='tickmarks'
+          min='12'
+          max='96'
+          step='6'
+          value='24'
         >
         <label for='message-ttl-setting'>24 Hours</label>
-        <datalist id="tickmarks">
-          <option value="12">
-          <option value="18">
-          <option value="24">
-          <option value="30">
-          <option value="36">
-          <option value="42">
-          <option value="48">
-          <option value="54">
-          <option value="60">
-          <option value="66">
-          <option value="72">
-          <option value="78">
-          <option value="84">
-          <option value="90">
-          <option value="96">
+        <datalist id='tickmarks'>
+          <option value='12'>
+          <option value='18'>
+          <option value='24'>
+          <option value='30'>
+          <option value='36'>
+          <option value='42'>
+          <option value='48'>
+          <option value='54'>
+          <option value='60'>
+          <option value='66'>
+          <option value='72'>
+          <option value='78'>
+          <option value='84'>
+          <option value='90'>
+          <option value='96'>
         </datalist>
       </div>
     </div>