diff --git a/README.md b/README.md
index cf33208ab18e6bc349a776a0c7100b89d8e6a7c0..d37a09adc0938d5d692b893431a39b04cac3bffc 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 ![alt text](https://www.ispconfig.org/wp-content/themes/ispconfig/images/ispconfig_logo.png "") \
 [![pipeline status](https://git.ispconfig.org/ispconfig/ispconfig-autoinstaller/badges/master/pipeline.svg)](https://git.ispconfig.org/ispconfig/ispconfig-autoinstaller/commits/master)   
 
-This script configures your server (Ubuntu 18.04, Ubuntu 20.04, Debian 9 and 10 currently) following the "perfect server tutorials" from howtoforge.com and installs ISPConfig 3.
+This script configures your server (Ubuntu 18.04, Ubuntu 20.04, Debian 9, 10 and 11 currently) following the "perfect server tutorials" from howtoforge.com and installs ISPConfig 3.
 
 ## Using the script
 You can use the script with curl  
diff --git a/lib/class.ISPConfig.inc.php b/lib/class.ISPConfig.inc.php
index a47fa65007bf7850f5999a517421228d2cb6e822..8f5331484d689cbaa8433365b5b9af4a754b2c1f 100644
--- a/lib/class.ISPConfig.inc.php
+++ b/lib/class.ISPConfig.inc.php
@@ -276,7 +276,7 @@ Possible arguments are:
 	--debug			->Enable verbose logging (logs each command with the exit code)
 	--channel		->Choose the channel to use for ISPConfig. --channel=<stable|dev>
 					->"stable" is the latest ISPConfig release available on www.ispconfig.org
-					->"dev" is the latest stable-branch from the ISPConfig git repository: https://git.ispconfig.org/ispconfig/ispconfig3/tree/stable-3.1
+					->"dev" is the latest dev-branch from the ISPConfig git repository: https://git.ispconfig.org/ispconfig/ispconfig3/tree/develop
 					-> The dev channel might contain bugs and less-tested features and should only be used in production by very experienced users.
 	--lang			->Use language for ISPConfig installation. Specify with --lang=en|de (only en (English) and de (German) supported currently).
 	--interactive	->Don\'t install ISPConfig in non-interactive mode. This is needed if you want to use expert mode, e. g. to install a slave server that shall be integrated into an existing multiserver setup.
diff --git a/lib/os/class.ISPConfigDebian11OS.inc.php b/lib/os/class.ISPConfigDebian11OS.inc.php
index 49d125eeff87633529c735d0e0753aef928867e3..e92ea0464fd23c8bead9a0aee36562317471c03f 100644
--- a/lib/os/class.ISPConfigDebian11OS.inc.php
+++ b/lib/os/class.ISPConfigDebian11OS.inc.php
@@ -49,7 +49,7 @@ class ISPConfigDebian11OS extends ISPConfigDebian10OS {
 	}
 
 	protected function isStableSupported() {
-		return false;
+		return true;
 	}
 
 	protected function shallCompileJailkit() {