diff --git a/ChangeLog b/ChangeLog
index fd67558e9..9eec36fb9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -4,6 +4,18 @@ Please check [doc/1-about.md].
 
 ## What's New
 
+### What's New in Version 2.4.9
+
+#### Changes
+
+This release fixes a number of issues introduced in 2.4.8.
+
+#### Bugfixes
+
+* Bug 11801 (Perfdata): Error: Function call 'rename' for file '/var/spool/icinga2/tmp/service-perfdata' failed with error code 2, 'No such file or directory'
+* Bug 11804 (Configuration): Segfault when trying to start 2.4.8
+* Bug 11807 (Compat): Command Pipe thread 100% CPU Usage
+
 ### What's New in Version 2.4.8
 
 #### Changes
diff --git a/RELEASE.md b/RELEASE.md
index da10b1b64..8d7859ac3 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -12,9 +12,9 @@ Check the following issue filters:
 ## Backport Commits
 
     $ git checkout master
-    $ ./pick.py -V 2.4.8
+    $ ./pick.py -V 2.4.9
 
-The script creates a new branch 'auto-merged-2.4.8' which is based on the
+The script creates a new branch 'auto-merged-2.4.9' which is based on the
 current support branch. It then merges all commits from the 'master' branch which
 reference a ticket for the version that was specified.
 
@@ -26,7 +26,7 @@ rebase until no commits are left:
 After finishing the rebase the branch needs to be merged into the support branch:
 
     $ git checkout support/2.4
-    $ git merge --ff-only auto-merged-2.4.8
+    $ git merge --ff-only auto-merged-2.4.9
 
 ## Authors
 
@@ -50,15 +50,15 @@ the changelog.py script. Also generate HTML for the wordpress release announceme
 
 Changelog:
 
-    $ ./changelog.py -V 2.4.8
+    $ ./changelog.py -V 2.4.9
 
 Docs:
 
-    $ ./changelog.py -V 2.4.8 -l
+    $ ./changelog.py -V 2.4.9 -l
 
 Wordpress:
 
-    $ ./changelog.py -V 2.4.8 -H -l
+    $ ./changelog.py -V 2.4.9 -H -l
 
 ## Git Tag
 
@@ -141,7 +141,7 @@ Create the nupkg package:
 
 Install the created icinga2 package locally:
 
-    choco install icinga2 -version 2.4.8 -fdv "%cd%" -source "'%cd%;https://chocolatey.org/api/v2/'"
+    choco install icinga2 -version 2.4.9 -fdv "%cd%" -source "'%cd%;https://chocolatey.org/api/v2/'"
 
 Upload the package to [chocolatey](https://chocolatey.org/packages/upload).
 
diff --git a/doc/1-about.md b/doc/1-about.md
index a8e8ad8b8..33c3745cf 100644
--- a/doc/1-about.md
+++ b/doc/1-about.md
@@ -54,6 +54,18 @@ More details in the [Icinga FAQ](https://www.icinga.org/icinga/faq/).
 
 ## <a id="whats-new"></a> What's New
 
+### What's New in Version 2.4.9
+
+#### Changes
+
+This release fixes a number of issues introduced in 2.4.8.
+
+#### Bugfixes
+
+* Bug [11801](https://dev.icinga.org/issues/11801 "Bug 11801") (Perfdata): Error: Function call 'rename' for file '/var/spool/icinga2/tmp/service-perfdata' failed with error code 2, 'No such file or directory'
+* Bug [11804](https://dev.icinga.org/issues/11804 "Bug 11804") (Configuration): Segfault when trying to start 2.4.8
+* Bug [11807](https://dev.icinga.org/issues/11807 "Bug 11807") (Compat): Command Pipe thread 100% CPU Usage
+
 ### What's New in Version 2.4.8
 
 #### Changes
diff --git a/icinga2.nuspec b/icinga2.nuspec
index 416a51b39..6ad7e265b 100755
--- a/icinga2.nuspec
+++ b/icinga2.nuspec
@@ -6,7 +6,7 @@
     <!-- Read this before publishing packages to chocolatey.org: https://github.com/chocolatey/chocolatey/wiki/CreatePackages -->
     <id>icinga2</id>
     <title>Icinga2</title>
-    <version>2.4.8</version>
+    <version>2.4.9</version>
     <authors>2016 - The Icinga Project</authors>
     <owners>Icinga Development Team</owners>
     <summary>icinga2 - Monitoring Agent for Windows</summary>
diff --git a/icinga2.spec b/icinga2.spec
index 426a49fa2..b26316a34 100644
--- a/icinga2.spec
+++ b/icinga2.spec
@@ -66,7 +66,7 @@
 
 Summary: Network monitoring application
 Name: icinga2
-Version: 2.4.8
+Version: 2.4.9
 Release: %{revision}%{?dist}
 License: GPL-2.0+
 Group: Applications/System
diff --git a/tools/chocolateyInstall.ps1 b/tools/chocolateyInstall.ps1
index 034446038..2d0013b33 100755
--- a/tools/chocolateyInstall.ps1
+++ b/tools/chocolateyInstall.ps1
@@ -1,7 +1,7 @@
 $packageName = 'icinga2'
 $installerType = 'msi'
-$url32 = 'http://packages.icinga.org/windows/Icinga2-v2.4.8-x86.msi'
-$url64 = 'http://packages.icinga.org/windows/Icinga2-v2.4.8-x86_64.msi'
+$url32 = 'http://packages.icinga.org/windows/Icinga2-v2.4.9-x86.msi'
+$url64 = 'http://packages.icinga.org/windows/Icinga2-v2.4.9-x86_64.msi'
 $silentArgs = '/qn /norestart'
 $validExitCodes = @(0)