diff --git a/scripts/install b/scripts/install
index f769a8b..f32252f 100644
--- a/scripts/install
+++ b/scripts/install
@@ -41,7 +41,7 @@ ynh_app_setting_set $app language $language
 sudo adduser $app --home /opt/$app --gecos "First Last,RoomNumber,WorkPhone,HomePhone" --disabled-password --disabled-login
 
 # Install debian package
-ynh_package_install imagemagick libpq-dev libxml2-dev libxslt1-dev file curl apt-transport-https pkg-config libprotobuf-dev protobuf-compiler
+ynh_package_install imagemagick libpq-dev libxml2-dev libxslt1-dev file curl apt-transport-https pkg-config libprotobuf-dev protobuf-compiler libicu-dev libidn11-dev
 
 # Install redis package
 ynh_package_install redis-server redis-tools
diff --git a/scripts/upgrade b/scripts/upgrade
index dae1d8d..99ae13f 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -65,7 +65,7 @@ if [[ $node_version =~ ^v4.*$  ]]; then
 fi
 
 # add additional package for release 1.4
-ynh_package_install pkg-config libprotobuf-dev protobuf-compiler
+ynh_package_install pkg-config libprotobuf-dev protobuf-compiler libicu-dev libidn11-dev
 
 # Apply Mastodon upgrade
 sudo su - $app <<COMMANDS
@@ -73,7 +73,7 @@ pushd ~/live
 bin/bundle install
 yarn install --pure-lockfile
 # For 1.4.1 -> 1.4.2 migration prepare_for_foreign_keys is needed
-RAILS_ENV=production bundle exec rails mastodon:maintenance:prepare_for_foreign_keys 
+RAILS_ENV=production bundle exec rails mastodon:maintenance:prepare_for_foreign_keys
 RAILS_ENV=production bundle exec rails assets:clean
 RAILS_ENV=production bundle exec rails assets:precompile
 RAILS_ENV=production bundle exec rails db:migrate