diff --git a/scripts/_common.sh b/scripts/_common.sh
index 0a018dc..93323b9 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -1,5 +1,12 @@
 #!/bin/bash
 
+#=================================================
+# COMMON VARIABLES
+#=================================================
+
+# dependencies used by the app
+pkg_dependencies="php-xml php-mbstring php-mysql"
+
 #=================================================
 # EXPERIMENTAL HELPERS
 #=================================================
diff --git a/scripts/install b/scripts/install
index aad55d3..8b145ac 100644
--- a/scripts/install
+++ b/scripts/install
@@ -53,6 +53,13 @@ ynh_app_setting_set --app=$app --key=path --value=$path_url
 
 #=================================================
 # STANDARD MODIFICATIONS
+#=================================================
+# INSTALL DEPENDENCIES
+#=================================================
+ynh_script_progression --message="Installing dependencies..." --weight=5
+
+ynh_install_app_dependencies $pkg_dependencies
+
 #=================================================
 # CREATE A MYSQL DATABASE
 #=================================================
diff --git a/scripts/remove b/scripts/remove
index 4d54f9a..2a8974a 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -6,7 +6,7 @@
 # IMPORT GENERIC HELPERS
 #=================================================
 
-# source _common.sh
+source _common.sh
 source /usr/share/yunohost/helpers
 
 #=================================================
@@ -30,6 +30,14 @@ ynh_script_progression --message="Removing the MySQL database" --weight=2
 # Remove a database if it exists, along with the associated user
 ynh_mysql_remove_db --db_user=$db_name --db_name=$db_name
 
+#=================================================
+# REMOVE DEPENDENCIES
+#=================================================
+ynh_script_progression --message="Removing dependencies..." --weight=4
+
+# Remove metapackage and its dependencies
+ynh_remove_app_dependencies
+
 #=================================================
 # REMOVE APP MAIN DIR
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index ea0a26f..9a07854 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -46,6 +46,13 @@ fi
 
 #=================================================
 # STANDARD RESTORATION STEPS
+#=================================================
+# REINSTALL DEPENDENCIES
+#=================================================
+ynh_script_progression --message="Reinstalling dependencies..." --weight=5
+
+ynh_install_app_dependencies $pkg_dependencies
+
 #=================================================
 # RESTORE THE NGINX CONFIGURATION
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 4d510df..2386a0a 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -6,7 +6,7 @@
 # IMPORT GENERIC HELPERS
 #=================================================
 
-#source _common.sh
+source _common.sh
 source /usr/share/yunohost/helpers
 
 #=================================================
@@ -87,6 +87,13 @@ ynh_script_progression --message="Upgrading nginx web server configuration..."
 # Create a dedicated nginx config
 ynh_add_nginx_config
 
+#=================================================
+# UPGRADE DEPENDENCIES
+#=================================================
+ynh_script_progression --message="Upgrading dependencies..." --weight=5
+
+ynh_install_app_dependencies $pkg_dependencies
+
 #=================================================
 # CREATE DEDICATED USER
 #=================================================