diff --git a/README.md b/README.md
index 156d167..48a038b 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,6 @@ If you don't have YunoHost, please consult [the guide](https://yunohost.org/#/in
 JupyterLab is the next-generation user interface for Project Jupyter offering all the familiar building blocks of the classic Jupyter Notebook (notebook, terminal, text editor, file browser, rich outputs, etc.) in a flexible and powerful user interface. JupyterLab will eventually replace the classic Jupyter Notebook.
 
 
-
 **Shipped version:** 4.0.0~ynh5
 
 
diff --git a/manifest.json b/manifest.json
index d297c58..a70be81 100644
--- a/manifest.json
+++ b/manifest.json
@@ -11,6 +11,7 @@
     "upstream": {
         "license": "BSD-3-Clause",
         "website": "https://jupyter.org",
+        "demo": "https://mybinder.org/v2/gh/jupyterlab/jupyterlab-demo/master?urlpath=lab/tree/demo",
         "admindoc": "https://jupyterlab.readthedocs.io/en/stable/",
         "code": "https://github.com/jupyterhub/jupyterhub",
         "cpe": "cpe:2.3:a:jupyter:nbdime-jupyterlab"
@@ -21,7 +22,7 @@
         "email": "pierre@kayou.io"
     },
     "requirements": {
-        "yunohost": ">=11.0.9"
+        "yunohost": ">= 11.0.9"
     },
     "multi_instance": true,
     "services": [
diff --git a/scripts/_common.sh b/scripts/_common.sh
index ff2c707..0899f35 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -9,7 +9,7 @@ pkg_dependencies="python3-dev python3-pip"
 
 nodejs_version="18"
 
-jupyterlab_version="4.0.0a27"
+jupyterlab_version="4.0.0a30"
 
 #=================================================
 # PERSONAL HELPERS
diff --git a/scripts/install b/scripts/install
index 6f8fb9a..8e65d9d 100644
--- a/scripts/install
+++ b/scripts/install
@@ -123,7 +123,7 @@ mkdir -p "$final_path"
 
 pushd $final_path
 	mkdir -p .venv
-	PIPENV_VENV_IN_PROJECT="enabled" PIPENV_SKIP_LOCK=true ynh_exec_warn_less python3 -m pipenv install jupyterlab==$jupyterlab_version jupyterhub notebook jupyterhub-ldapauthenticator pyzmq --three
+	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 --three
 popd
 
 #=================================================
diff --git a/scripts/remove b/scripts/remove
index a4d5e6e..71f2e5b 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -28,7 +28,7 @@ final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 # Remove the service from the list of services known by YunoHost (added from `yunohost service add`)
 if ynh_exec_warn_less yunohost service status $app >/dev/null
 then
-	ynh_script_progression --message="Removing $app service integration..."--weight=2
+	ynh_script_progression --message="Removing $app service integration..." --weight=2
 	yunohost service remove $app
 fi