diff --git a/Docs/AutoUpdate.md b/Docs/AutoUpdate.md
new file mode 100644
index 0000000..207b52f
--- /dev/null
+++ b/Docs/AutoUpdate.md
@@ -0,0 +1,41 @@
+# Auto Update
+
+## AppCast.xml
+
+To enable auto update, you need to prepare an **AppCast.xml**([sample](https://github.com/HackPlan/menubar-webkit/blob/updater/updater/SampleAppcast.xml)) like this:
+
+```xml
+<?xml version="1.0" encoding="utf-8"?>
+<rss version="2.0" xmlns:sparkle="http://www.andymatuschak.org/xml-namespaces/sparkle" xmlns:dc="http://purl.org/dc/elements/1.1/">
+    <channel>
+        <title>[App Name]</title>
+        <link>[AppCast.xml Link]</link>
+        <description>Most recent changes with links to updates.</description>
+        <language>en</language>
+        <item>
+            <title>Version [x.yz]</title>
+            <sparkle:releaseNotesLink>[Link to Release Notes]</sparkle:releaseNotesLink>
+            <pubDate>[Release Date]</pubDate>
+            <enclosure url="[Update File URL]" sparkle:version="[Version String]" length="[Update File Length]" type="application/octet-stream" />
+            <sparkle:minimumSystemVersion>[Minimum System Version]</sparkle:minimumSystemVersion>
+        </item>
+    </channel>
+</rss>
+```
+
+## Code Signing
+
+For safety reasons, you have to code sign your app properly to enable auto update.
+
+## Check for Update
+
+We provide two APIs for checking update, both require an URL to AppCast.xml:
+
+```js
+mw.checkUpdate("https://rawgit.com/HackPlan/menubar-webkit/updater/updater/SampleAppcast.xml")
+mw.checkUpdateInBackground("https://rawgit.com/HackPlan/menubar-webkit/updater/updater/SampleAppcast.xml")
+```
+
+## Under the Hood
+
+Menubar WebKit uses [Sparkle](https://github.com/sparkle-project/Sparkle) as update engine, refer to the documentation for Sparkle for more detail.
diff --git a/Podfile b/Podfile
index 47a73db..93d5b4e 100644
--- a/Podfile
+++ b/Podfile
@@ -2,4 +2,4 @@ platform :osx, '10.9'
 
 pod 'MASShortcut',  :git => 'git@github.com:xhacker/MASShortcut.git', :branch => 'menubar-webkit'
 pod 'RHPreferences', :head
-pod 'Sparkle', :git => 'git@github.com:xhacker/Sparkle.git', :branch => 'podspec', :podspec => 'https://raw.githubusercontent.com/xhacker/Sparkle/podspec/Sparkle.podspec'
+pod 'Sparkle', '~> 1.7.1'
diff --git a/Podfile.lock b/Podfile.lock
index 2c74871..a63ba6f 100644
--- a/Podfile.lock
+++ b/Podfile.lock
@@ -6,20 +6,16 @@ PODS:
 DEPENDENCIES:
   - MASShortcut (from `git@github.com:xhacker/MASShortcut.git`, branch `menubar-webkit`)
   - RHPreferences (HEAD)
-  - Sparkle (from `git@github.com:xhacker/Sparkle.git`, branch `podspec`)
+  - Sparkle (~> 1.7.1)
 
 EXTERNAL SOURCES:
   MASShortcut:
     :branch: menubar-webkit
     :git: git@github.com:xhacker/MASShortcut.git
-  Sparkle:
-    :branch: podspec
-    :git: git@github.com:xhacker/Sparkle.git
-    :podspec: https://raw.githubusercontent.com/xhacker/Sparkle/podspec/Sparkle.podspec
 
 SPEC CHECKSUMS:
   MASShortcut: a1e29fd34567fcd249d00648548924c8e7639474
   RHPreferences: d0215102b7b8cd9f501655e5e7db2551ef4dc0e5
-  Sparkle: efbd7f0f72767ce302b01deaf888b7afeb14febd
+  Sparkle: fde5ffeb7bf01db28925499ce2a75977763af58a
 
 COCOAPODS: 0.33.1
diff --git a/README.md b/README.md
index 4eea42f..5c44040 100644
--- a/README.md
+++ b/README.md
@@ -72,6 +72,16 @@ mw.pin()
 mw.unpin()
 ```
 
+### Auto Update
+
+```js
+// Check for update
+mw.checkUpdate("https://rawgit.com/HackPlan/menubar-webkit/updater/updater/SampleAppcast.xml")
+mw.checkUpdateInBackground("https://rawgit.com/HackPlan/menubar-webkit/updater/updater/SampleAppcast.xml")
+```
+
+More detail: [AutoUpdate.md](Docs/AutoUpdate.md)
+
 ## Integrating Web App
 
 ``public/index.html`` is the portal of your menubar app. ``public/preferences/[identifier].html`` are the preference pages (for example, ``public/preferences/general.html``).
@@ -101,6 +111,7 @@ Used third-party libraries:
 
 * [MASShortcut](https://github.com/shpakovski/MASShortcut) by [@shpakovski](https://github.com/shpakovski)
 * [RHPreferences](https://github.com/heardrwt/RHPreferences) by [@heardrwt](https://github.com/heardrwt)
+* [Sparkle](https://github.com/sparkle-project/Sparkle) by [contributors](https://github.com/sparkle-project/Sparkle/graphs/contributors)
 
 ## Contribution