diff --git a/auto_upgrade_container.sh b/auto_upgrade_container.sh
index 7b1fe83..9ee92ee 100755
--- a/auto_upgrade_container.sh
+++ b/auto_upgrade_container.sh
@@ -3,7 +3,7 @@
 current_dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 source $current_dir/utils.sh # Get utils functions.
 
-for debian_version in "buster" "bullseye"
+for debian_version in "bullseye"
 do
 	for ynh_version in "stable" "testing" "unstable"
 	do
@@ -13,3 +13,14 @@ do
 		done
 	done
 done
+
+for debian_version in "bookworm"
+do
+	for ynh_version in "unstable"
+	do
+		for snapshot in "before-install" "after-install"
+		do
+			update_image $debian_version $ynh_version $snapshot
+		done
+	done
+done
diff --git a/rebuild_all.sh b/rebuild_all.sh
index 21e8da0..b222bf7 100755
--- a/rebuild_all.sh
+++ b/rebuild_all.sh
@@ -3,7 +3,7 @@
 current_dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 source $current_dir/utils.sh # Get utils functions.
 
-for debian_version in "buster" "bullseye"
+for debian_version in "bullseye"
 do
 	rebuild_base_containers $debian_version "stable" "amd64"
 
@@ -34,3 +34,10 @@ do
 		done
 	done
 done
+
+
+for debian_version in "bookworm"
+do
+	rebuild_base_containers $debian_version "unstable" "amd64"
+done
+
diff --git a/utils.sh b/utils.sh
index 9ec6cd1..955f4f3 100755
--- a/utils.sh
+++ b/utils.sh
@@ -140,14 +140,26 @@ rotate_image()
 # /!\ There's a high risk of lamentable failure if we change the format of this file
 get_dependencies()
 {
-	# To extract the dependencies, we want to retrieve the lines between "^Dependencies:" and the new line that doesn't start with a space (exclusively) . Then, we remove ",", then we remove the version specifiers "(>= X.Y)", then we add simple quotes to packages when there is a pipe (or) 'php-mysql|php-mysqlnd'.
-	YUNOHOST_DEPENDENCIES=$(curl https://raw.githubusercontent.com/YunoHost/yunohost/dev/debian/control 2> /dev/null | sed -n '/^Depends:/,/^\w/{//!p}' | sed -e "s/,//g" -e "s/[(][^)]*[)]//g" -e "s/ | \S\+//g" | grep -v moulinette | grep -v ssowat | tr "\n" " ")
-	YUNOHOST_RECOMMENDS=$(curl https://raw.githubusercontent.com/YunoHost/yunohost/dev/debian/control 2> /dev/null | sed -n '/^Recommends:/,/^\w/{//!p}' | sed -e "s/,//g" -e "s/[(][^)]*[)]//g" -e "s/ | \S\+//g" | tr "\n" " ")
-	MOULINETTE_DEPENDENCIES=$(curl https://raw.githubusercontent.com/YunoHost/moulinette/dev/debian/control 2> /dev/null | sed -n '/^Depends:/,/^\w/{//!p}' | sed -e "s/,//g" -e "s/[(][^)]*[)]//g" -e "s/ | \S\+//g" | tr "\n" " ")
-	# Same as above, except that all dependencies are in the same line
-	SSOWAT_DEPENDENCIES=$(curl https://raw.githubusercontent.com/YunoHost/ssowat/dev/debian/control 2> /dev/null | grep '^Depends:' | sed 's/Depends://' | sed -e "s/,//g" -e "s/[(][^)]*[)]//g" -e "s/ | \S\+//g" | tr "\n" " ")
-	BUILD_DEPENDENCIES="git-buildpackage postfix python-setuptools python3-pip devscripts"
-	PIP3_PKG="mock pip pyOpenSSL pytest pytest-cov pytest-mock pytest-sugar requests-mock tox ansi2html black jinja2 types-ipaddress types-enum34 types-cryptography types-toml types-requests types-PyYAML types-pyOpenSSL types-mock"
+        local debian_version=$1
+        if [[ "$debian_version" == "bullseye" ]]
+        then
+                local branch="dev"
+        else
+                local branch="$debian_version"
+        fi
+
+        # To extract the dependencies, we want to retrieve the lines between "^Dependencies:" and the new line that doesn't start with a space (exclusively) . Then, we remove ",", then we remove the version specifiers "(>= X.Y)", then we add simple quotes to packages when there is a pipe (or) 'php-mysql|php-mysqlnd'.
+        YUNOHOST_DEPENDENCIES=$(curl https://raw.githubusercontent.com/YunoHost/yunohost/$branch/debian/control 2> /dev/null | sed -n '/^Depends:/,/^\w/{//!p}' | sed -e "s/,//g" -e "s/[(][^)]*[)]//g" -e "s/ | \S\+//g" | grep -v moulinette | grep -v ssowat | tr "\n" " ")
+        YUNOHOST_RECOMMENDS=$(curl https://raw.githubusercontent.com/YunoHost/yunohost/$branch/debian/control 2> /dev/null | sed -n '/^Recommends:/,/^\w/{//!p}' | sed -e "s/,//g" -e "s/[(][^)]*[)]//g" -e "s/ | \S\+//g" | tr "\n" " ")
+        MOULINETTE_DEPENDENCIES=$(curl https://raw.githubusercontent.com/YunoHost/moulinette/$branch/debian/control 2> /dev/null | sed -n '/^Depends:/,/^\w/{//!p}' | sed -e "s/,//g" -e "s/[(][^)]*[)]//g" -e "s/ | \S\+//g" | tr "\n" " ")
+        # Same as above, except that all dependencies are in the same line
+        SSOWAT_DEPENDENCIES=$(curl https://raw.githubusercontent.com/YunoHost/ssowat/$branch/debian/control 2> /dev/null | grep '^Depends:' | sed 's/Depends://' | sed -e "s/,//g" -e "s/[(][^)]*[)]//g" -e "s/ | \S\+//g" | tr "\n" " ")
+        BUILD_DEPENDENCIES="git-buildpackage postfix python3-setuptools python3-pip devscripts"
+        PIP3_PKG='mock pip pyOpenSSL pytest pytest-cov pytest-mock pytest-sugar requests-mock tox ansi2html black jinja2 types-ipaddress types-enum34 types-cryptography types-toml types-requests types-PyYAML types-pyOpenSSL types-mock  "packaging<22"'
+        if [[ "$debian_version" == "bookworm" ]]
+        then
+                PIP3_PKG="$PIP3_PKG --break-system-packages"
+        fi
 }
 
 rebuild_base_containers()
@@ -189,7 +201,7 @@ rebuild_base_containers()
 	# Run the YunoHost install script patched
 	lxc exec "$base_image_to_rebuild-tmp" -- /bin/bash -c "cat install.sh | bash -s -- -a -d $ynh_version"
 
-	get_dependencies
+	get_dependencies $debian_version
 
 	# Pre install dependencies
 	lxc exec "$base_image_to_rebuild-tmp" -- /bin/bash -c "DEBIAN_FRONTEND=noninteractive SUDO_FORCE_REMOVE=yes apt-get --assume-yes install --assume-yes $YUNOHOST_DEPENDENCIES $YUNOHOST_RECOMMENDS $MOULINETTE_DEPENDENCIES $SSOWAT_DEPENDENCIES $BUILD_DEPENDENCIES"
@@ -240,7 +252,7 @@ update_image() {
 	lxc exec "$image_to_update-tmp" -- /bin/bash -c "apt-get update"
 	lxc exec "$image_to_update-tmp" -- /bin/bash -c "apt-get upgrade --assume-yes"
 	
-	get_dependencies
+	get_dependencies $debian_version
 
 	lxc exec "$image_to_update-tmp" -- /bin/bash -c "DEBIAN_FRONTEND=noninteractive SUDO_FORCE_REMOVE=yes apt-get --assume-yes -o Dpkg::Options::=\"--force-confold\" install --assume-yes $YUNOHOST_DEPENDENCIES $YUNOHOST_RECOMMENDS $MOULINETTE_DEPENDENCIES $SSOWAT_DEPENDENCIES $BUILD_DEPENDENCIES"
 	lxc exec "$image_to_update-tmp" -- /bin/bash -c "python3 -m pip install -U $PIP3_PKG"
diff --git a/variables.sh b/variables.sh
index d9f5eb4..a7626ab 100755
--- a/variables.sh
+++ b/variables.sh
@@ -13,10 +13,10 @@ CURRENT_BRANCH="$CUSTOM_ENV_CI_COMMIT_REF_NAME" # CUSTOM_ENV_CI_COMMIT_REF_NAME
 LAST_CHANGELOG_ENTRY=$(curl https://gitlab.com/yunohost/yunohost/-/raw/$CURRENT_BRANCH/debian/changelog --silent | head -n 1) # yunohost (4.2) unstable; urgency=low
 CURRENT_VERSION=$(echo $LAST_CHANGELOG_ENTRY | cut -d' ' -f3 | tr -d ';') # stable, testing, unstable
 
-DEBIAN_VERSION_NUMBER=$(echo $LAST_CHANGELOG_ENTRY | cut -d' ' -f2 | tr -d '(' | tr -d ')' | cut -d'.' -f1) # 3, 4, 11
+DEBIAN_VERSION_NUMBER=$(echo $LAST_CHANGELOG_ENTRY | cut -d' ' -f2 | tr -d '(' | tr -d ')' | cut -d'.' -f1) # 11, 12
 
 declare -A DEBIAN_VERSION_TABLE
-DEBIAN_VERSION_TABLE=(["4"]="buster" ["11"]="bullseye")
+DEBIAN_VERSION_TABLE=(["11"]="bullseye" ["12"]="bookworm")
 
 DEBIAN_VERSION="${DEBIAN_VERSION_TABLE[$DEBIAN_VERSION_NUMBER]}"