diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 59ab604f5..53ffe490d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -145,11 +145,15 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        context: [analyzer, api_client]
+        context:
+          - analyzer
+          - api_client
         release:
-          - bionic
           - buster
+          - bullseye
+          - bionic
           - focal
+
     container: ghcr.io/libretime/libretime-dev:${{ matrix.release }}
     defaults:
       run:
@@ -174,11 +178,14 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        context: [api]
+        context:
+          - api
         release:
-          - bionic
           - buster
+          - bullseye
+          - bionic
           - focal
+
     services:
       postgres:
         image: postgres
diff --git a/Vagrantfile b/Vagrantfile
index d91d61f26..90faf1496 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -96,6 +96,15 @@ Vagrant.configure('2') do |config|
     setup_libretime(os, 'debian.sh')
   end
 
+  config.vm.define 'debian-bullseye' do |os|
+    os.vm.box = 'debian/bullseye64'
+    config.vm.provider 'virtualbox' do |v, override|
+      override.vm.box = 'bento/debian-11'
+    end
+    setup_nfs(config, 4)
+    setup_libretime(os, 'debian.sh')
+  end
+
   config.vm.define 'debian-buster' do |os|
     os.vm.box = 'debian/buster64'
     config.vm.provider 'virtualbox' do |v, override|
diff --git a/analyzer/tests/cuepoint_analyzer_test.py b/analyzer/tests/cuepoint_analyzer_test.py
index 3851449fd..5a7f15e90 100644
--- a/analyzer/tests/cuepoint_analyzer_test.py
+++ b/analyzer/tests/cuepoint_analyzer_test.py
@@ -19,8 +19,12 @@ def test_analyze(filepath, length, cuein, cueout):
     if filepath.endswith("m4a"):
         return
 
-    # Silan does not work with mp3 on debian buster or Ubuntu Focal
-    if filepath.endswith("mp3") and distro.codename() in ("buster", "focal"):
+    # Silan does not work with mp3 on buster, bullseye, focal
+    if filepath.endswith("mp3") and distro.codename() in (
+        "buster",
+        "bullseye",
+        "focal",
+    ):
         return
 
     assert float(metadata["cuein"]) == pytest.approx(cuein, abs=0.5)
diff --git a/analyzer/tests/playability_analyzer_test.py b/analyzer/tests/playability_analyzer_test.py
index b6d14d751..4f6976367 100644
--- a/analyzer/tests/playability_analyzer_test.py
+++ b/analyzer/tests/playability_analyzer_test.py
@@ -30,8 +30,8 @@ def test_analyze_invalid_filepath():
 
 
 def test_analyze_invalid_wma():
-    # Liquisoap does not fail with wma files on debian buster or Ubuntu Focal
-    if distro.codename() in ("buster", "focal"):
+    # Liquisoap does not fail with wma files on buster, bullseye, focal
+    if distro.codename() in ("buster", "bullseye", "focal"):
         return
 
     with pytest.raises(UnplayableFileError):
diff --git a/api/packages.ini b/api/packages.ini
index 145ce6f83..1b28f85e7 100644
--- a/api/packages.ini
+++ b/api/packages.ini
@@ -1,14 +1,14 @@
 # This file contains a list of package dependencies.
 [common]
-python3 = buster, bionic, focal
-python3-pip = buster, bionic, focal
-python3-venv = buster, bionic, focal
+python3 = buster, bullseye, bionic, focal
+python3-pip = buster, bullseye, bionic, focal
+python3-venv = buster, bullseye, bionic, focal
 
 [django]
-uwsgi = buster, bionic, focal
-uwsgi-plugin-python3 = buster, bionic, focal
+uwsgi = buster, bullseye, bionic, focal
+uwsgi-plugin-python3 = buster, bullseye, bionic, focal
 
 [psycopg2]
 # See https://www.psycopg.org/docs/install.html#install-from-source
-python3-dev = buster, bionic, focal
-libpq-dev = buster, bionic, focal
+python3-dev = buster, bullseye, bionic, focal
+libpq-dev = buster, bullseye, bionic, focal
diff --git a/docs/_docs/vagrant.md b/docs/_docs/vagrant.md
index 0fe03d7af..15eaad5ae 100644
--- a/docs/_docs/vagrant.md
+++ b/docs/_docs/vagrant.md
@@ -91,12 +91,13 @@ directory.
 With the above instructions LibreTime is installed on Ubuntu Bionic. The Vagrant setup
 offers the option to choose a different operation system according to you needs.
 
-| OS           | Command                    | Comment                                                     |
-| ------------ | -------------------------- | ----------------------------------------------------------- |
-| Debian 10    | `vagrant up debian-buster` | Install on Debian Buster.                                   |
-| Ubuntu 20.04 | `vagrant up ubuntu-focal`  | Install on Ubuntu Focal Fossa.                              |
-| Ubuntu 18.04 | `vagrant up ubuntu-bionic` | Install on Ubuntu Bionic Beaver.                            |
-| CentOS       | `vagrant up centos`        | CentOS 8 with native systemd support and activated SELinux. |
+| OS           | Command                      | Comment                                                     |
+| ------------ | ---------------------------- | ----------------------------------------------------------- |
+| Debian 10    | `vagrant up debian-buster`   | Install on Debian Buster.                                   |
+| Debian 11    | `vagrant up debian-bullseye` | Install on Debian Bullseye.                                 |
+| Ubuntu 18.04 | `vagrant up ubuntu-bionic`   | Install on Ubuntu Bionic Beaver.                            |
+| Ubuntu 20.04 | `vagrant up ubuntu-focal`    | Install on Ubuntu Focal Fossa.                              |
+| CentOS       | `vagrant up centos`          | CentOS 8 with native systemd support and activated SELinux. |
 
 ## Troubleshooting
 
diff --git a/install b/install
index 241f59ac8..eb2818ee2 100755
--- a/install
+++ b/install
@@ -647,6 +647,7 @@ fi
 # Validate the distribution and release is a supported one; set boolean flags.
 is_debian_dist=false
 is_debian_buster=false
+is_debian_bullseye=false
 is_ubuntu_dist=false
 is_ubuntu_focal=false
 is_ubuntu_bionic=false
@@ -685,6 +686,11 @@ case "${dist}-${code}" in
     is_debian_dist=true
     is_debian_buster=true
     ;;
+  debian-11 | debian-bullseye)
+    code="bullseye"
+    is_debian_dist=true
+    is_debian_bullseye=true
+    ;;
   #Fix for Raspbian 9 (stretch)
   raspbian-9)
     echo -e "ERROR: Raspbian Stretch is archived and does not receive any security or other updates since 2020-06-06." >&2
@@ -1081,13 +1087,14 @@ loud "              * Configuring PHP in Apache *          "
 loud "-----------------------------------------------------"
 # Test common locations for php conf directory
 php_conf_dirs=(
-  "/etc/php/7.4/apache2/conf.d" # Ubuntu Focal
+  "/etc/php/7.4/apache2/conf.d" # Debian Bullseye, Ubuntu Focal
   "/etc/php/7.3/apache2/conf.d" # Debian Buster
   "/etc/php/7.2/apache2/conf.d" # Ubuntu Bionic
   "/etc/php/7.0/apache2/conf.d" # Ubuntu Xenial
   "/etc/php5/apache2/conf.d"    # Debian Stretch, Debian Jessie, Ubuntu Trusty
   "/etc/php.d"                  # CentOS 7
 )
+
 for php_conf in "${php_conf_dirs[@]}"; do
   [[ -d $php_conf ]] && break
 done
@@ -1106,7 +1113,7 @@ else
 fi
 
 # Enable Apache modules
-if $is_ubuntu_focal; then
+if $is_debian_bullseye || $is_ubuntu_focal; then
   loudCmd "a2enmod rewrite php7.4 proxy proxy_http"
 elif $is_debian_buster; then
   loudCmd "a2enmod rewrite php7.3 proxy proxy_http"
diff --git a/legacy/packages.ini b/legacy/packages.ini
index d7b3e39bc..778f8d173 100644
--- a/legacy/packages.ini
+++ b/legacy/packages.ini
@@ -1,10 +1,10 @@
 # This file contains a list of package dependencies.
 [common]
-apache2 = buster, bionic, focal
+apache2 = buster, bullseye, bionic, focal
 # The php-pear package depends on php-(cli|common|xml), be sure to
 # install the dependencies with the right php version.
-php-pear = buster, bionic, focal
-php-amqplib = buster, bionic, focal
+php-pear = buster, bullseye, bionic, focal
+php-amqplib = buster, bullseye, bionic, focal
 
 # Bionic
 [php7.2]
@@ -39,18 +39,18 @@ php7.3-mbstring = buster
 php7.3-pgsql = buster
 php7.3-xml = buster
 
-# Focal
+# Bullseye, Focal
 [php7.4]
-libapache2-mod-php7.4 = focal
-php7.4 = focal
-php7.4-apcu = focal
-php7.4-apcu-bc = focal
-php7.4-bcmath = focal
-php7.4-cli = focal
-php7.4-common = focal
-php7.4-curl = focal
-php7.4-dev = focal
-php7.4-gd = focal
-php7.4-mbstring = focal
-php7.4-pgsql = focal
-php7.4-xml = focal
+libapache2-mod-php7.4 = bullseye, focal
+php7.4 = bullseye, focal
+php7.4-apcu = bullseye, focal
+php7.4-apcu-bc = bullseye, focal
+php7.4-bcmath = bullseye, focal
+php7.4-cli = bullseye, focal
+php7.4-common = bullseye, focal
+php7.4-curl = bullseye, focal
+php7.4-dev = bullseye, focal
+php7.4-gd = bullseye, focal
+php7.4-mbstring = bullseye, focal
+php7.4-pgsql = bullseye, focal
+php7.4-xml = bullseye, focal
diff --git a/packages.ini b/packages.ini
index ad437d912..34d966e0c 100644
--- a/packages.ini
+++ b/packages.ini
@@ -1,16 +1,16 @@
 # This file contains a list of package dependencies.
 [common]
-icecast2 = buster, bionic, focal
-postgresql = buster, bionic, focal
-postgresql-client = buster, bionic, focal
-rabbitmq-server = buster, bionic, focal
+icecast2 = buster, bullseye, bionic, focal
+postgresql = buster, bullseye, bionic, focal
+postgresql-client = buster, bullseye, bionic, focal
+rabbitmq-server = buster, bullseye, bionic, focal
 
-curl = buster, bionic, focal
+curl = buster, bullseye, bionic, focal
 
 # See https://github.com/Libretime/libretime/commits/71ce3082c5e0611f77eb423a15b4b36267ebfda4/installer/lib
-unzip = buster, bionic, focal
-zip = buster, bionic, focal
+unzip = buster, bullseye, bionic, focal
+zip = buster, bullseye, bionic, focal
 
 [installer]
-lsb-release = buster, bionic, focal
-xmlstarlet = buster, bionic, focal
+lsb-release = buster, bullseye, bionic, focal
+xmlstarlet = buster, bullseye, bionic, focal