diff --git a/CHANGELOG.md b/CHANGELOG.md
index 876afe8..1eb2c12 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -30,6 +30,7 @@ For major (breaking) changes - version 3 and 2 see end of page.
 
 | Version        | Date           | Comment  |
 | -------------- | -------------- | -------- |
+| 4.2.0          | 2019-05-09     | `osInfo()` extended service pack version (windows) |
 | 4.1.8          | 2019-05-09     | `graphics()` resolve on error (windows) |
 | 4.1.7          | 2019-05-09     | `users()` parsing fix (windows) |
 | 4.1.6          | 2019-04-24     | `memory()` swap used fix (linux) |
diff --git a/README.md b/README.md
index a11372c..ea1dd31 100644
--- a/README.md
+++ b/README.md
@@ -276,6 +276,7 @@ I also created a nice little command line tool called [mmon][mmon-github-url]  (
 | | logofile | X | X | X | X | X | e.g. 'apple', 'debian', 'fedora', ... |
 | | serial | X | X | X | X |   | OS/Host serial number |
 | | build | X |   | X | X |   | OS build version |
+| | servicepack | | | | X |   | service pack version |
 | si.uuid(cb) | {...} | X | X | X | X | X | object of several UUIDs |
 | | os | X | X | X | X |  | os specific UUID |
 | si.versions(cb) | {...} | X | X | X | X | X | version information (kernel, ssl, node, ...) |
diff --git a/docs/history.html b/docs/history.html
index 597becc..187f0b3 100644
--- a/docs/history.html
+++ b/docs/history.html
@@ -80,6 +80,11 @@
                   </tr>
                 </thead>
                 <tbody>
+                  <tr>
+                    <th scope="row">4.2.0</th>
+                    <td>2019-05-09</td>
+                    <td><span class="code">osInfo()</span> extended service pack version (windows)</td>
+                  </tr>
                   <tr>
                     <th scope="row">4.1.8</th>
                     <td>2019-05-09</td>
diff --git a/docs/index.html b/docs/index.html
index 5511e38..d782e5e 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></div>
-      <div class="version">Current Version: <span id="version">4.1.8</span></div>
+      <div class="version">Current Version: <span id="version">4.2.0</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/docs/os.html b/docs/os.html
index 3e21079..1df7358 100644
--- a/docs/os.html
+++ b/docs/os.html
@@ -185,6 +185,16 @@
                     <td></td>
                     <td>OS build version</td>
                   </tr>
+                  <tr>
+                    <td></td>
+                    <td>servicepack</td>
+                    <td></td>
+                    <td></td>
+                    <td></td>
+                    <td>X</td>
+                    <td></td>
+                    <td>service pack version</td>
+                  </tr>
                   <tr>
                     <td>si.uuid(cb)</td>
                     <td>{...}</td>
diff --git a/lib/osinfo.js b/lib/osinfo.js
index 2c0c3ad..a68b627 100644
--- a/lib/osinfo.js
+++ b/lib/osinfo.js
@@ -175,7 +175,8 @@ function osInfo(callback) {
         codepage: '',
         logofile: '',
         serial: '',
-        build: ''
+        build: '',
+        servicepack: ''
       };
 
       if (_linux) {
@@ -286,6 +287,7 @@ function osInfo(callback) {
             result.distro = util.getValue(lines, 'Caption', '=').trim();
             result.serial = util.getValue(lines, 'SerialNumber', '=').trim();
             result.build = util.getValue(lines, 'BuildNumber', '=').trim();
+            result.servicepack = util.getValue(lines, 'ServicePackMajorVersion', '=').trim() + '.' + util.getValue(lines, 'ServicePackMinorVersion', '=').trim();
             result.codepage = util.getCodepage();
             if (callback) {
               callback(result);