diff --git a/CHANGELOG.md b/CHANGELOG.md
index fb6dd9d..bd7cac3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -77,7 +77,8 @@ For major (breaking) changes - **version 4, 3 and 2** - see end of page.
 
 | Version        | Date           | Comment  |
 | -------------- | -------------- | -------- |
-| 5.6.19         | 2021-05-06     | `services()`  modified service listing (linux) |
+| 5.6.20         | 2021-05-07     | `system()` fixed vm detection (linux) |
+| 5.6.19         | 2021-05-06     | `services()` modified service listing (linux) |
 | 5.6.18         | 2021-05-06     | `processes()` fixed Windows mem bug (naming conform to all platforms) |
 | 5.6.17         | 2021-05-05     | `networkInterfaces()` fixed Windows XP bug (WMIC NetEnabled) |
 | 5.6.16         | 2021-05-05     | `graphics()` fixed compare bug |
diff --git a/docs/history.html b/docs/history.html
index 3a5a1fa..7afb22b 100644
--- a/docs/history.html
+++ b/docs/history.html
@@ -56,6 +56,11 @@
                   </tr>
                 </thead>
                 <tbody>
+                  <tr>
+                    <th scope="row">5.6.20</th>
+                    <td>2021-05-07</td>
+                    <td><span class="code">system()</span> fixed vm detection (linux)</td>
+                  </tr>
                   <tr>
                     <th scope="row">5.6.19</th>
                     <td>2021-05-06</td>
diff --git a/docs/index.html b/docs/index.html
index 659d6e5..17ab6ca 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">5.6.19</span></div>
+      <div class="version">New Version: <span id="version">5.6.20</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/system.js b/lib/system.js
index 762da34..e42ce7b 100644
--- a/lib/system.js
+++ b/lib/system.js
@@ -159,7 +159,7 @@ function system(callback) {
             result.model = 'Docker Container';
           }
           try {
-            const stdout = execSync('dmesg 2>/dev/null | grep -iE "virtual|hypervisor" | grep -iE "vmware|qemu|kvm|xen"');
+            const stdout = execSync('dmesg 2>/dev/null | grep -iE "virtual|hypervisor" | grep -iE "vmware|qemu|kvm|xen" | grep -vi "Nested Virtualization"');
             // detect virtual machines
             let lines = stdout.toString().split('\n');
             if (lines.length > 0) {