diff --git a/scripts/install b/scripts/install
index 3cfff11..d807a74 100644
--- a/scripts/install
+++ b/scripts/install
@@ -59,14 +59,14 @@ ynh_app_setting_set $app port $port
 # Find a free port
 peer_port=$(ynh_find_port 51413)
 # Open this port
-yunohost firewall allow TCP $peer_port >/dev/null 2>&1
+yunohost firewall allow Both $peer_port >/dev/null 2>&1
 ynh_app_setting_set $app peer_port $peer_port
 
 #=================================================
 # INSTALL TRANSMISSION
 #=================================================
 
-ynh_package_install transmission-daemon
+ynh_install_app_dependencies transmission-daemon acl
 
 #=================================================
 # NGINX CONFIGURATION
diff --git a/scripts/remove b/scripts/remove
index f89c7f8..f09a23c 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -25,8 +25,7 @@ peer_port=$(ynh_app_setting_get $app peer_port)
 # REMOVE TRANSMISSION-DAEMON
 #=================================================
 
-ynh_apt purge transmission-daemon
-ynh_package_autoremove transmission-common
+ynh_remove_app_dependencies
 
 #=================================================
 # DISABLE SERVICE IN ADMIN PANEL
@@ -51,7 +50,7 @@ fi
 if yunohost firewall list | grep -q "\- $peer_port$"
 then
 	echo "Close port $peer_port"
-	yunohost firewall disallow TCP $peer_port 2>&1
+	yunohost firewall disallow Both $peer_port 2>&1
 fi
 
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index bb6e1ce..f10f782 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -52,7 +52,7 @@ ynh_restore_file "/etc/nginx/conf.d/$domain.d/$app.conf"
 #=================================================
 
 yunohost firewall allow --no-upnp TCP $port >/dev/null 2>&1
-yunohost firewall allow TCP $peer_port >/dev/null 2>&1
+yunohost firewall allow Both $peer_port >/dev/null 2>&1
 
 #=================================================
 # SPECIFIC RESTORE
@@ -60,7 +60,7 @@ yunohost firewall allow TCP $peer_port >/dev/null 2>&1
 # REINSTALL TRANSMISSION
 #=================================================
 
-ynh_package_install transmission-daemon
+ynh_install_app_dependencies transmission-daemon acl
 
 #=================================================
 # RESTORE TRANSMISSION CONFIGURATION
diff --git a/scripts/upgrade b/scripts/upgrade
index 45f99fa..43eb9f2 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -33,6 +33,9 @@ if [ -z $peer_port ]; then
 	ynh_app_setting_set $app peer_port $peer_port
 fi
 
+# Add peer_port also on UDP.
+yunohost firewall allow UDP $peer_port >/dev/null 2>&1
+
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
 #=================================================
@@ -63,6 +66,12 @@ path_url=$(ynh_normalize_url_path $path_url)
 [ "$path_url" = "/" ] || path_url=${path_url}/
 ynh_add_nginx_config
 
+#=================================================
+# INSTALL DEPENDENCIES
+#=================================================
+
+ynh_install_app_dependencies transmission-daemon acl
+
 #=================================================
 # SPECIFIC UPGRADE
 #=================================================