diff --git a/appcast.xml b/appcast.xml
index 997eaa17..18fa22d3 100644
--- a/appcast.xml
+++ b/appcast.xml
@@ -4,6 +4,20 @@
     <title>alt-tab-macos</title>
     <language>en</language>
 
+    <item>
+      <title>Version 6.21.0</title>
+      <pubDate>Sat, 17 Apr 2021 11:27:32 +0000</pubDate>
+      <sparkle:minimumSystemVersion>10.12</sparkle:minimumSystemVersion>
+      <sparkle:releaseNotesLink>https://alt-tab-macos.netlify.app/changelog-bare</sparkle:releaseNotesLink>
+      <enclosure
+        url="https://github.com/lwouis/alt-tab-macos/releases/download/v6.21.0/AltTab-6.21.0.zip"
+        sparkle:version="6.21.0"
+        sparkle:shortVersionString="6.21.0"
+        sparkle:edSignature="IcmNZ1MFcHgNGP8dY9oGqIndQeyUAo1/jQLKICtPrTXiXwRaAZjQ5Lw0MLmkfbVzfU3Wu8gUHzqzoDXSpyyaBg==" length="7278671"
+        type="application/octet-stream"/>
+    </item>
+
+
     <item>
       <title>Version 6.20.0</title>
       <pubDate>Thu, 15 Apr 2021 10:44:09 +0000</pubDate>
diff --git a/docs/Changelog.md b/docs/Changelog.md
index ea7986f0..b8527fb5 100644
--- a/docs/Changelog.md
+++ b/docs/Changelog.md
@@ -1,5 +1,17 @@
 # Release notes
 
+# [6.21.0](https://github.com/lwouis/alt-tab-macos/compare/v6.20.0...v6.21.0) (2021-04-17)
+
+
+### Bug Fixes
+
+* apps could steal key focus from alt-tab main window ([#719](https://github.com/lwouis/alt-tab-macos/issues/719) [#916](https://github.com/lwouis/alt-tab-macos/issues/916)) ([6be72f3](https://github.com/lwouis/alt-tab-macos/commit/6be72f3))
+
+
+### Features
+
+* update korean location ([c1fc40d](https://github.com/lwouis/alt-tab-macos/commit/c1fc40d))
+
 # [6.20.0](https://github.com/lwouis/alt-tab-macos/compare/v6.19.0...v6.20.0) (2021-04-15)