diff --git a/scripts/upgrade b/scripts/upgrade
index 9c753b9..bb9ec38 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -46,7 +46,7 @@ then
 
 	pushd $install_dir
 		mkdir -p .venv
-		PIPENV_VENV_IN_PROJECT="enabled" PIPENV_SKIP_LOCK=true ynh_exec_warn_less python3 -m pipenv install jupyterlab==$jupyterlab_version jupyterhub notebook jupyterhub-ldapauthenticator pyzmq
+		PIPENV_VENV_IN_PROJECT="enabled" PIPENV_SKIP_LOCK=true ynh_exec_warn_less python3 -m pipenv install jupyterlab==$jupyterlab_version jupyterhub notebook jupyterhub-ldapauthenticator pyzmq jupyterlab-language-pack-fr-FR
 	popd
 fi
 
@@ -60,7 +60,6 @@ mkdir -p "$install_dir/config"
 path=${path%/}
 
 ynh_add_config --template="../conf/jupyterhub_config.py" --destination="$install_dir/config/jupyterhub_config.py"
-
 ynh_add_config --template="../conf/jupyter_notebook_config.py" --destination="$install_dir/config/jupyter_notebook_config.py"
 
 chown -R root: $install_dir/