diff --git a/scripts/_common.sh b/scripts/_common.sh
index ce634ac..8170e19 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -6,11 +6,11 @@
 
 nodejs_version=14
 
+mongo_version=5.0
+
 # dependencies used by the app
 pkg_dependencies="apt-transport-https build-essential gzip curl fontconfig graphicsmagick"
 
-YNH_MONGO_VERSION=4.4
-
 #=================================================
 # PERSONAL HELPERS
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 4ebd4e3..ea52458 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -25,11 +25,11 @@ port=$(ynh_app_setting_get --app=$app --key=port)
 password=$(ynh_app_setting_get --app=$app --key=password)
 admin=$(ynh_app_setting_get --app=$app --key=admin)
 email=$(ynh_app_setting_get --app=$app --key=email)
+mongo_version=$(ynh_app_setting_get --app=$app --key=mongo_version)
 
 #=================================================
 # CHECK VERSION
 #=================================================
-ynh_script_progression --message="Checking version..."
 
 upgrade_type=$(ynh_check_app_version_changed)
 
@@ -75,6 +75,12 @@ if ynh_legacy_permissions_exists; then
 	ynh_app_setting_delete --app=$app --key=is_public
 fi
 
+# If mongo_version doesn't exist, create it
+if [ -z "$mongo_version" ]; then
+	mongo_version="$(mongod --version | grep -oP 'db version v\K.{0,3}')"
+	ynh_app_setting_set --app=$app --key=mongo_version --value=$mongo_version
+fi
+
 #=================================================
 # CREATE DEDICATED USER
 #=================================================
@@ -107,7 +113,7 @@ ynh_script_progression --message="Upgrading dependencies..." --weight=7
 
 ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies
 ynh_exec_warn_less ynh_install_nodejs --nodejs_version=$nodejs_version
-ynh_exec_warn_less ynh_install_mongo
+ynh_exec_warn_less ynh_install_mongo --mongo_version=$mongo_version
 ynh_exec_warn_less ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ stable main" --package="yarn" --key="https://dl.yarnpkg.com/debian/pubkey.gpg"
 
 #=================================================