diff --git a/CHANGELOG.md b/CHANGELOG.md
index f18b410..9f08ed1 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  |
 | -------------- | -------------- | -------- |
+| 4.27.3         | 2020-08-26     | updated typescript typings |
 | 4.27.2         | 2020-08-26     | fixed issue breaking node v4 compatibility |
 | 4.27.1         | 2020-08-25     | `networkStats()` fixed packages dropped (linux) |
 | 4.27.0         | 2020-08-24     | `observe()` added function to observe/watch system parameters |
diff --git a/docs/history.html b/docs/history.html
index 4160ffe..28b445e 100644
--- a/docs/history.html
+++ b/docs/history.html
@@ -83,6 +83,11 @@
                   </tr>
                 </thead>
                 <tbody>
+                  <tr>
+                    <th scope="row">4.27.3</th>
+                    <td>2020-08-26</td>
+                    <td>updated typescript typings</td>
+                  </tr>
                   <tr>
                     <th scope="row">4.27.2</th>
                     <td>2020-08-26</td>
diff --git a/docs/index.html b/docs/index.html
index 40db54b..a6763ca 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -168,7 +168,7 @@
       <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">4.27.2</span></div>
+      <div class="version">Current Version: <span id="version">4.27.3</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/index.d.ts b/lib/index.d.ts
index 16225e7..8ce2701 100644
--- a/lib/index.d.ts
+++ b/lib/index.d.ts
@@ -758,3 +758,4 @@ export function getStaticData(cb?: (data: Systeminformation.StaticData) => any):
 export function getDynamicData(srv?: string, iface?: string, cb?: (data: any) => any): Promise<any>;
 export function getAllData(srv?: string, iface?: string, cb?: (data: any) => any): Promise<any>;
 export function get(valuesObject: any, cb?: (data: any) => any): Promise<any>;
+export function observe(valuesObject: any, interval: number, cb?: (data: any) => any): number;