diff --git a/scripts/install b/scripts/install
index f441599..a7cdb79 100755
--- a/scripts/install
+++ b/scripts/install
@@ -51,6 +51,7 @@ pushd $install_dir
 
 	ynh_script_progression --message="npm install... This can be very long, be patient !" --weight=18
 	ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH $ynh_npm ci --quiet --production --prefer-offline --network-timeout=100000
+	ynh_exec_warn_less ynh_exec_as $app env $ynh_node_load_PATH $ynh_npm install --save-dev @types/html-escaper
 
 	ynh_script_progression --message="npm run build... This can be very long, be patient !" --weight=25
 	SOURCE_VERSION="$(cat $YNH_APP_BASEDIR/manifest.toml | toml_to_json | jq -r ".resources.sources.main.url" | awk -F/ '{ print $NF }')"