diff --git a/CHANGELOG.md b/CHANGELOG.md
index e692c36..397c638 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -80,6 +80,7 @@ For major (breaking) changes - **version 4, 3 and 2** - see end of page.
 
 | Version        | Date           | Comment  |
 | -------------- | -------------- | -------- |
+| 5.9.13         | 2021-11-14     | `time()` timezone name, `l1 cache` improvements |
 | 5.9.12         | 2021-11-13     | `users()` fix data check (windows) |
 | 5.9.11         | 2021-11-12     | `fsStats()` fix null result (bsd) |
 | 5.9.10         | 2021-11-11     | `powerShell` transition from `wmic` (windows) |
diff --git a/docs/history.html b/docs/history.html
index 4c20b8b..055043c 100644
--- a/docs/history.html
+++ b/docs/history.html
@@ -57,6 +57,11 @@
                     </tr>
                   </thead>
                   <tbody>
+                    <tr>
+                      <th scope="row">5.9.13</th>
+                      <td>2021-11-14</td>
+                      <td><span class="code">time()</span> timezone name, <span class="code">cpu()</span> l1 cache improvement</td>
+                    </tr>
                     <tr>
                       <th scope="row">5.9.12</th>
                       <td>2021-11-13</td>
diff --git a/docs/index.html b/docs/index.html
index 692ffff..3b9ac8b 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -170,7 +170,7 @@
       <img class="logo" src="assets/logo.png">
       <div class="title">systeminformation</div>
       <div class="subtitle"><span id="typed"></span>&nbsp;</div>
-      <div class="version">New Version: <span id="version">5.9.12</span></div>
+      <div class="version">New Version: <span id="version">5.9.13</span></div>
       <button class="btn btn-light" onclick="location.href='https://github.com/sebhildebrandt/systeminformation'">View on Github <i class=" fab fa-github"></i></button>
     </div>
     <div class="down">
diff --git a/lib/cpu.js b/lib/cpu.js
index df56bb2..1fe4160 100644
--- a/lib/cpu.js
+++ b/lib/cpu.js
@@ -781,7 +781,7 @@ function getCpu() {
           try {
             const workload = [];
             workload.push(util.powerShell('Get-WmiObject Win32_processor | fl *'));
-            workload.push(util.powerShell('Get-WmiObject Win32_CacheMemory | select CacheType,InstalledSize,Purpose | fl *'));
+            workload.push(util.powerShell('Get-WmiObject Win32_CacheMemory | select CacheType,InstalledSize,Level | fl *'));
             // workload.push(util.powerShell('Get-ComputerInfo -property "HyperV*"'));
             workload.push(util.powerShell('(Get-CimInstance Win32_ComputerSystem).HypervisorPresent'));
 
@@ -852,16 +852,21 @@ function getCpu() {
               parts.forEach(function (part) {
                 lines = part.split('\r\n');
                 const cacheType = util.getValue(lines, 'CacheType');
-                const purpose = util.getValue(lines, 'Purpose');
+                const level = util.getValue(lines, 'Level');
                 const installedSize = util.getValue(lines, 'InstalledSize');
                 // L1 Instructions
-                if (purpose === 'L1 Cache' && cacheType === '3') {
+                if (level === '3' && cacheType === '3') {
                   result.cache.l1i = parseInt(installedSize, 10);
                 }
                 // L1 Data
-                if (purpose === 'L1 Cache' && cacheType === '4') {
+                if (level === '3' && cacheType === '4') {
                   result.cache.l1d = parseInt(installedSize, 10);
                 }
+                // L1 all
+                if (level === '3' && cacheType === '5' && !result.cache.l1i && !result.cache.l1d) {
+                  result.cache.l1i = parseInt(installedSize, 10) / 2;
+                  result.cache.l1d = parseInt(installedSize, 10) / 2;
+                }
               });
               // lines = data[2].split('\r\n');
               // result.virtualization = (util.getValue(lines, 'HyperVRequirementVirtualizationFirmwareEnabled').toLowerCase() === 'true');
@@ -1413,21 +1418,26 @@ function cpuCache(callback) {
               if (result.l2) { result.l2 = parseInt(result.l2, 10) * 1024; }
               if (result.l3) { result.l3 = parseInt(result.l3, 10) * 1024; }
             }
-            util.powerShell('Get-WmiObject Win32_CacheMemory | select CacheType,InstalledSize,Purpose | fl ').then((stdout, error) => {
+            util.powerShell('Get-WmiObject Win32_CacheMemory | select CacheType,InstalledSize,Level | fl ').then((stdout, error) => {
               if (!error) {
                 const parts = stdout.split(/\n\s*\n/);
                 parts.forEach(function (part) {
                   const lines = part.split('\r\n');
                   const cacheType = util.getValue(lines, 'CacheType');
-                  const purpose = util.getValue(lines, 'Purpose');
+                  const level = util.getValue(lines, 'Level');
                   const installedSize = util.getValue(lines, 'InstalledSize');
                   // L1 Instructions
-                  if (purpose === 'L1 Cache' && cacheType === '3') {
-                    result.l1i = parseInt(installedSize, 10);
+                  if (level === '3' && cacheType === '3') {
+                    result.cache.l1i = parseInt(installedSize, 10);
                   }
                   // L1 Data
-                  if (purpose === 'L1 Cache' && cacheType === '4') {
-                    result.l1d = parseInt(installedSize, 10);
+                  if (level === '3' && cacheType === '4') {
+                    result.cache.l1d = parseInt(installedSize, 10);
+                  }
+                  // L1 all
+                  if (level === '3' && cacheType === '5' && !result.cache.l1i && !result.cache.l1d) {
+                    result.cache.l1i = parseInt(installedSize, 10) / 2;
+                    result.cache.l1d = parseInt(installedSize, 10) / 2;
                   }
                 });
               }
diff --git a/lib/osinfo.js b/lib/osinfo.js
index 41e3d8b..b144b02 100644
--- a/lib/osinfo.js
+++ b/lib/osinfo.js
@@ -35,12 +35,11 @@ const _sunos = (_platform === 'sunos');
 
 function time() {
   let t = new Date().toString().split(' ');
-
   return {
     current: Date.now(),
     uptime: os.uptime(),
     timezone: (t.length >= 7) ? t[5] : '',
-    timezoneName: (t.length >= 7) ? t.slice(6).join(' ').replace(/\(/g, '').replace(/\)/g, '') : ''
+    timezoneName: Intl ? Intl.DateTimeFormat().resolvedOptions().timeZone : (t.length >= 7) ? t.slice(6).join(' ').replace(/\(/g, '').replace(/\)/g, '') : ''
   };
 }
 
diff --git a/package.json b/package.json
index 5d676b6..d8bfce1 100644
--- a/package.json
+++ b/package.json
@@ -93,6 +93,6 @@
     "sunos"
   ],
   "engines": {
-    "node": ">=4.0.0"
+    "node": ">=8.0.0"
   }
 }