diff --git a/conf/tomcat.service b/conf/tomcat.service
index 1f1e0c9..fd777fe 100644
--- a/conf/tomcat.service
+++ b/conf/tomcat.service
@@ -1,13 +1,13 @@
 [Unit]
 Description=Apache Tomcat 9 Web Application Server
 After=network.target
-RequiresMountsFor=/var/log/__APP__/tomcat __INSTALL_DIR__/var/lib/tomcat9
+RequiresMountsFor=/var/log/__APP__/tomcat __INSTALL_DIR__/var/lib/__TOMCAT_VERSION__
 
 [Service]
 
 # Configuration
-Environment="CATALINA_HOME=/usr/share/tomcat9"
-Environment="CATALINA_BASE=__INSTALL_DIR__/var/lib/tomcat9"
+Environment="CATALINA_HOME=/usr/share/__TOMCAT_VERSION__"
+Environment="CATALINA_BASE=__INSTALL_DIR__/var/lib/__TOMCAT_VERSION__"
 Environment="CATALINA_TMPDIR=/tmp"
 Environment="JAVA_OPTS=-Djava.awt.headless=true"
 Environment="GUACAMOLE_HOME=__INSTALL_DIR__/etc/guacamole"
@@ -15,13 +15,13 @@ Environment="GUACAMOLE_HOME=__INSTALL_DIR__/etc/guacamole"
 
 # Lifecycle
 Type=simple
-ExecStartPre=+/usr/libexec/tomcat9/tomcat-update-policy.sh
-ExecStart=/bin/sh /usr/libexec/tomcat9/tomcat-start.sh > /var/log/__APP__/tomcat/tomcat.log 2>&1
+ExecStartPre=+/usr/libexec/__TOMCAT_VERSION__/tomcat-update-policy.sh
+ExecStart=/bin/sh /usr/libexec/__TOMCAT_VERSION__/tomcat-start.sh > /var/log/__APP__/tomcat/tomcat.log 2>&1
 SuccessExitStatus=143
 Restart=on-abort
 
 # Logging
-SyslogIdentifier=__APP__-tomcat9
+SyslogIdentifier=__APP__-__TOMCAT_VERSION__
 
 # Security
 User=__APP__-tomcat
@@ -29,11 +29,11 @@ Group=__APP__-tomcat
 PrivateTmp=yes
 AmbientCapabilities=CAP_NET_BIND_SERVICE
 NoNewPrivileges=true
-CacheDirectory=__APP__-tomcat9
+CacheDirectory=__APP__-__TOMCAT_VERSION__
 CacheDirectoryMode=750
 ProtectSystem=strict
-ReadWritePaths=__INSTALL_DIR__/etc/tomcat9/Catalina/
-ReadWritePaths=__INSTALL_DIR__/var/lib/tomcat9/webapps/
+ReadWritePaths=__INSTALL_DIR__/etc/__TOMCAT_VERSION__/Catalina/
+ReadWritePaths=__INSTALL_DIR__/var/lib/__TOMCAT_VERSION__/webapps/
 ReadWritePaths=/var/log/__APP__/tomcat/
 
 [Install]
diff --git a/manifest.toml b/manifest.toml
index 3a84dbe..7ccc285 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -7,7 +7,7 @@ name = "Guacamole"
 description.en = "Clientless remote desktop gateway. It supports standard protocols like VNC, RDP, and SSH"
 description.fr = "Service de bureau à distance sans client. Fonctionne avec des protocoles standard comme VNC, RDP, et SSH"
 
-version = "1.5.4~ynh1"
+version = "1.5.5~ynh1"
 
 maintainers = ["Jules Bertholet"]
 
@@ -42,35 +42,33 @@ ram.runtime = "50M"
     type = "user"
 
     [install.init_main_permission]
-    help.en = "Not recommended"
-    help.fr = "Pas reccomandé"
     type = "group"
     default = "all_users"
 
 [resources]
     [resources.sources]
     [resources.sources.server]
-    url = "https://downloads.apache.org/guacamole/1.5.4/source/guacamole-server-1.5.4.tar.gz"
-    sha256 = "4c0add552b1fc387c23a35c430155e01f2dfcf9daa0f96fbf805d0ace756729e"
+    url = "https://downloads.apache.org/guacamole/1.5.5/source/guacamole-server-1.5.5.tar.gz"
+    sha256 = "67499611c2e22d9c933763adc5408e716a4bfd08a3eb8a5ba2fc6f8f70868f6b"
 
     [resources.sources.client]
-    url = "https://downloads.apache.org/guacamole/1.5.4/binary/guacamole-1.5.4.war"
-    sha256 = "5728b563911bd64bce0a0b81c74ea8ccb2190d1785bff34030fc6885a8273d3e"
+    url = "https://downloads.apache.org/guacamole/1.5.5/binary/guacamole-1.5.5.war"
+    sha256 = "4267307f3600663723f24af92d596e99c8359425315135052a42d451f9529200"
     format = "zip"
     extract = false
     rename = "guacamole.war"
 
     [resources.sources.auth-header]
-    url = "https://downloads.apache.org/guacamole/1.5.4/binary/guacamole-auth-header-1.5.4.tar.gz"
-    sha256 = "7a0adc0daa19ec69a0244f491222c62124b02f81f40aa91e9a94d06a2635d038"
+    url = "https://downloads.apache.org/guacamole/1.5.5/binary/guacamole-auth-header-1.5.5.tar.gz"
+    sha256 = "a39ca9563be6d31b4dc1251c76a62baeb2a9d4930b3055e342bb9ce80e526a78"
 
     [resources.sources.auth-ldap]
-    url = "https://downloads.apache.org/guacamole/1.5.4/binary/guacamole-auth-ldap-1.5.4.tar.gz"
-    sha256 = "f912fe921cd0d429a752709e31a37b931e95d88a47bc4007ab49377d1c1a6336"
+    url = "https://downloads.apache.org/guacamole/1.5.5/binary/guacamole-auth-ldap-1.5.5.tar.gz"
+    sha256 = "01d3cd74da5de9da9cc73a788ab2938dd44f5cbe42ad90eebb4bee07f246dfa3"
 
     [resources.sources.auth-jdbc]
-    url = "https://downloads.apache.org/guacamole/1.5.4/binary/guacamole-auth-jdbc-1.5.4.tar.gz"
-    sha256 = "f45736b28eb6647b7eb0d2b48331e12e5a432661f61115b63d1a05a5bd20244d"
+    url = "https://downloads.apache.org/guacamole/1.5.5/binary/guacamole-auth-jdbc-1.5.5.tar.gz"
+    sha256 = "80cca0a02076babad0dc7c76b60daa896f3d9bf10be82708f425fd42ce411393"
 
     [resources.sources.mariadb-java-client]
     url = "https://downloads.mariadb.com/Connectors/java/connector-java-2.7.4/mariadb-java-client-2.7.4.jar"
@@ -86,6 +84,13 @@ ram.runtime = "50M"
     extract = false
     rename = "tomcat9.deb"
 
+    [resources.sources.tomcat10_deb]
+    url = "https://ftp.debian.org/debian/pool/main/t/tomcat10/tomcat10_10.1.6-1+deb12u2_all.deb"
+    sha256 = "69cf85b0e9934314677a881a994a694c0f2fcf27065d520ef99305e53795f7f8"
+    format = "whatever"
+    extract = false
+    rename = "tomcat10.deb"
+
     [resources.ports]
     main.default = 8080
     guacd.default = 4822
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 11a92d5..966dd6d 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -4,7 +4,11 @@
 # COMMON VARIABLES
 #=================================================
 
-guacamole_version="1.5.4"
+if [ "$YNH_DEBIAN_VERSION" == "bullseye" ] ; then
+    tomcat_version="tomcat9"
+elif [ "$YNH_DEBIAN_VERSION" == "bookworm" ] ; then
+    tomcat_version="tomcat10"
+fi
 
 #=================================================
 # PERSONAL HELPERS
@@ -14,25 +18,26 @@ function setup_sources {
 	ynh_setup_source --source_id="server" --dest_dir="$install_dir/.guacd-src"
 
 	tomcat_guac_dir="$path"
-	if [ "$path" == "/" -o -z "$path" ]; then
+	if [ "$path" == "/" ]; then
 		tomcat_guac_dir="ROOT"
 	fi
 
-	ynh_setup_source --source_id="tomcat9_deb" --dest_dir="$install_dir/downloads/tomcat9"
-	pushd "$install_dir/downloads/tomcat9" || ynh_die
-		ar x "tomcat9.deb" "data.tar.xz"
+	ynh_setup_source --source_id="${tomcat_version}_deb" --dest_dir="$install_dir/downloads/$tomcat_version"
+	pushd "$install_dir/downloads/$tomcat_version"
+		ar x "$tomcat_version.deb" "data.tar.xz"
 		tar xJf data.tar.xz
-	popd || ynh_die
+	popd
 	mkdir -p "$install_dir/etc"
-	cp -r "$install_dir/downloads/tomcat9/usr/share/tomcat9/etc" -T "$install_dir/etc/tomcat9/"
-	cp -r "$install_dir/downloads/tomcat9/etc/tomcat9/" -T "$install_dir/etc/tomcat9/"
+	cp -r "$install_dir/downloads/$tomcat_version/usr/share/$tomcat_version/etc" -T "$install_dir/etc/$tomcat_version/"
+	cp -r "$install_dir/downloads/$tomcat_version/etc/$tomcat_version/" -T "$install_dir/etc/$tomcat_version/"
 
 	ynh_setup_source --source_id="client" --dest_dir="$install_dir/downloads"
-	mkdir -p "$install_dir/var/lib/tomcat9/webapps"
-	mv "$install_dir/downloads/guacamole.war" "$install_dir/var/lib/tomcat9/webapps/$tomcat_guac_dir.war"
+	mkdir -p "$install_dir/var/lib/$tomcat_version/webapps"
+	mv "$install_dir/downloads/guacamole.war" "$install_dir/var/lib/$tomcat_version/webapps/$tomcat_guac_dir.war"
 
 	mkdir -p "$install_dir/etc/guacamole/extensions"
 
+    guacamole_version="$(ynh_app_upstream_version)"
 	ynh_setup_source --source_id="auth-ldap" --dest_dir="$install_dir/downloads/auth-ldap"
 	mv "$install_dir/downloads/auth-ldap/guacamole-auth-ldap-$guacamole_version.jar" "$install_dir/etc/guacamole/extensions/guacamole-auth-ldap.jar"
 
@@ -55,19 +60,11 @@ function _set_permissions() {
 	setfacl -n -R -m "user:$app-guacd:rx" -m "default:user:$app-guacd:rx" "$install_dir"
 	setfacl -n -R -m "user:$app-tomcat:rx" -m "default:user:$app-tomcat:rx" "$install_dir"
 
-	# chown -R nobody:$app-tomcat "$install_dir/etc/tomcat9/" "$install_dir/etc/guacamole/"
-	chown -R "$app-tomcat":"$app-tomcat" "$install_dir/var/lib/tomcat9/webapps"
+	# chown -R nobody:$app-tomcat "$install_dir/etc/$tomcat_version/" "$install_dir/etc/guacamole/"
+	chown -R "$app-tomcat":"$app-tomcat" "$install_dir/var/lib/$tomcat_version/webapps"
 	setfacl -n -R -m "user:$app-guacd:-" -m "default:user:$app-guacd:-" \
-		"$install_dir/var/lib/tomcat9/" "$install_dir/etc/guacamole/" "$install_dir/etc/tomcat9/"
+		"$install_dir/var/lib/$tomcat_version/" "$install_dir/etc/guacamole/" "$install_dir/etc/$tomcat_version/"
 
 	chown -R "$app-guacd:$app-guacd" "/var/log/$app/guacd/"
 	chown -R "$app-tomcat:$app-tomcat" "/var/log/$app/tomcat/"
 }
-
-#=================================================
-# EXPERIMENTAL HELPERS
-#=================================================
-
-#=================================================
-# FUTURE OFFICIAL HELPERS
-#=================================================
diff --git a/scripts/change_url b/scripts/change_url
index cb11768..b65c972 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -44,7 +44,7 @@ if [ $change_path -eq 1 ]; then
 		new_path_tomcat="ROOT"
 	fi
 
-	mv "$install_dir/var/lib/tomcat9/webapps/$old_path_tomcat" "$install_dir/var/lib/tomcat9/webapps/$new_path_tomcat"
+	mv "$install_dir/var/lib/$tomcat_version/webapps/$old_path_tomcat" "$install_dir/var/lib/$tomcat_version/webapps/$new_path_tomcat"
 fi
 
 #=================================================
diff --git a/scripts/install b/scripts/install
index bdc9698..edda8a2 100755
--- a/scripts/install
+++ b/scripts/install
@@ -17,23 +17,11 @@ ynh_script_progression --message="Stopping system tomcat..." --weight=1
 # Guacamole depends on Apache Tomcat.
 # But installing Tomcat from the Debian repos automatically enables and starts it.
 # So we stop and disable it, unless Tomcat was already enabled or started by the user beforehand
-
-tomcat_enabled=""
-tomcat_active=""
-if [ "$(systemctl cat tomcat9 --quiet)" ]; then
-	if (systemctl is-enabled tomcat9 --quiet); then
-		tomcat_enabled=1
-	fi
-	if (systemctl is-active tomcat9 --quiet); then
-		tomcat_active=1
-	fi
+if systemctl is-enabled $tomcat_version --quiet 2>/dev/null; then
+	systemctl disable $tomcat_version --quiet
 fi
-
-if [ $tomcat_enabled ]; then
-	systemctl disable tomcat9 --quiet
-fi
-if [ $tomcat_active ]; then
-	systemctl stop tomcat9 --quiet
+if systemctl is-active $tomcat_version --quiet 2>/dev/null; then
+	systemctl stop $tomcat_version --quiet
 fi
 
 #=================================================
@@ -55,9 +43,9 @@ setup_sources
 
 mkdir -p "/var/log/$app/tomcat/" "/var/log/$app/guacd/" "/var/log/$app/tomcat/"
 mkdir -p "$install_dir/etc/"
-ln -s -f "$install_dir/etc/tomcat9" "$install_dir/var/lib/tomcat9/conf"
-ln -s -f "/var/log/$app/tomcat/" "$install_dir/var/lib/tomcat9/logs"
-ln -s -f "/var/cache/$app-tomcat9" "$install_dir/var/lib/tomcat9/work"
+ln -s -f "$install_dir/etc/$tomcat_version" "$install_dir/var/lib/$tomcat_version/conf"
+ln -s -f "/var/log/$app/tomcat/" "$install_dir/var/lib/$tomcat_version/logs"
+ln -s -f "/var/cache/$app-$tomcat_version" "$install_dir/var/lib/$tomcat_version/work"
 
 #=================================================
 # ADD CONFIGURATIONS
@@ -65,7 +53,7 @@ ln -s -f "/var/cache/$app-tomcat9" "$install_dir/var/lib/tomcat9/work"
 
 ynh_add_config --template="guacamole.properties" --destination="$install_dir/etc/guacamole/guacamole.properties"
 
-ynh_replace_string --match_string="8080" --replace_string="$port" --target_file="$install_dir/etc/tomcat9/server.xml"
+ynh_replace_string --match_string="8080" --replace_string="$port" --target_file="$install_dir/etc/$tomcat_version/server.xml"
 
 _set_permissions
 
diff --git a/scripts/restore b/scripts/restore
index 7dcd68e..983c00c 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -15,22 +15,11 @@ source /usr/share/yunohost/helpers
 #=================================================
 ynh_script_progression --message="Stopping system tomcat..." --weight=1
 
-tomcat_enabled=""
-tomcat_active=""
-if [ "$(systemctl cat tomcat9 --quiet)" ]; then
-	if (systemctl is-enabled tomcat9 --quiet); then
-		tomcat_enabled=1
-	fi
-	if (systemctl is-active tomcat9 --quiet); then
-		tomcat_active=1
-	fi
+if systemctl is-enabled $tomcat_version --quiet 2>/dev/null; then
+	systemctl disable $tomcat_version --quiet
 fi
-
-if [ ! $tomcat_enabled ]; then
-	systemctl disable tomcat9 --quiet
-fi
-if [ ! $tomcat_active ]; then
-	systemctl stop tomcat9 --quiet
+if systemctl is-active $tomcat_version --quiet 2>/dev/null; then
+	systemctl stop $tomcat_version --quiet
 fi
 
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 63ed75e..f2dbd7d 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -62,23 +62,11 @@ ynh_script_progression --message="Upgrading dependencies..." --weight=1
 # Guacamole depends on Apache Tomcat.
 # But installing Tomcat from the Debian repos automatically enables and starts it.
 # So we stop and disable it, unless Tomcat was already enabled or started by the user beforehand
-
-tomcat_enabled=""
-tomcat_active=""
-if [ "$(systemctl cat tomcat9 --quiet)" ]; then
-	if (systemctl is-enabled tomcat9 --quiet); then
-		tomcat_enabled=1
-	fi
-	if (systemctl is-active tomcat9 --quiet); then
-		tomcat_active=1
-	fi
+if systemctl is-enabled $tomcat_version --quiet 2>/dev/null; then
+	systemctl disable $tomcat_version --quiet
 fi
-
-if [ ! $tomcat_enabled ]; then
-	systemctl disable tomcat9 --quiet
-fi
-if [ ! $tomcat_active ]; then
-	systemctl stop tomcat9 --quiet
+if systemctl is-active $tomcat_version --quiet 2>/dev/null; then
+	systemctl stop $tomcat_version --quiet
 fi
 
 #=================================================
@@ -99,9 +87,9 @@ popd
 #=================================================
 
 mkdir -p "$install_dir/etc/"
-ln -s -f "$install_dir/etc/tomcat9" "$install_dir/var/lib/tomcat9/conf"
-ln -s -f "/var/log/$app/tomcat/" "$install_dir/var/lib/tomcat9/logs"
-ln -s -f "/var/cache/$app-tomcat9" "$install_dir/var/lib/tomcat9/work"
+ln -s -f "$install_dir/etc/$tomcat_version" "$install_dir/var/lib/$tomcat_version/conf"
+ln -s -f "/var/log/$app/tomcat/" "$install_dir/var/lib/$tomcat_version/logs"
+ln -s -f "/var/cache/$app-$tomcat_version" "$install_dir/var/lib/$tomcat_version/work"
 
 #=================================================
 # CREATE LOG DIRS
@@ -115,7 +103,7 @@ mkdir -p "/var/log/$app/tomcat/" "/var/log/$app/guacd/" "/var/log/$app/tomcat/"
 
 ynh_add_config --template="guacamole.properties" --destination="$install_dir/etc/guacamole/guacamole.properties"
 
-ynh_replace_string --match_string="8080" --replace_string="$port" --target_file="$install_dir/etc/tomcat9/server.xml"
+ynh_replace_string --match_string="8080" --replace_string="$port" --target_file="$install_dir/etc/$tomcat_version/server.xml"
 
 #=================================================
 # SETUP SYSTEMD