diff --git a/scripts/_common.sh b/scripts/_common.sh
index da0b085..8944eb8 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -9,7 +9,7 @@ pkg_dependencies="python3-dev python3-pip libffi-dev libzmq3-dev"
 
 nodejs_version="14"
 
-jupyterlab_version="3.0.10"
+jupyterlab_version="3.0.11"
 
 #=================================================
 # PERSONAL HELPERS
diff --git a/scripts/change_url b/scripts/change_url
index 0ab8719..4d89301 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -33,6 +33,23 @@ port_hub=$(ynh_app_setting_get --app=$app --key=port_hub)
 port_http_proxy=$(ynh_app_setting_get --app=$app --key=port_http_proxy)
 admin=$(ynh_app_setting_get --app=$app --key=admin)
 
+#=================================================
+# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
+#=================================================
+ynh_script_progression --message="Backing up the app before changing its URL (may take a while)..." --weight=1
+
+# Backup the current version of the app
+ynh_backup_before_upgrade
+ynh_clean_setup () {
+	# Remove the new domain config file, the remove script won't do it as it doesn't know yet its location.
+	ynh_secure_remove --file="/etc/nginx/conf.d/$new_domain.d/$app.conf"
+
+	# Restore it if the upgrade fails
+	ynh_restore_upgradebackup
+}
+# Exit if an error occurs during the execution of the script
+ynh_abort_if_errors
+
 #=================================================
 # CHECK WHICH PARTS SHOULD BE CHANGED
 #=================================================
@@ -93,21 +110,23 @@ fi
 # CONFIGURE JUPYTERLAB
 #=================================================
 
-ynh_backup_if_checksum_is_different --file="$final_path/config/jupyterhub_config.py"
+#ynh_backup_if_checksum_is_different --file="$final_path/config/jupyterhub_config.py"
 
 domain=$new_domain
-path_url=$new_path
+path_url=${new_path%/}
 
-cp -f ../conf/jupyterhub_config.py $final_path/config/jupyterhub_config.py
-ynh_replace_string --match_string="__URL__" --replace_string="https://$domain" --target_file="$final_path/config/jupyterhub_config.py"
-ynh_replace_string --match_string="__PATH__" --replace_string="${path_url%/}" --target_file="$final_path/config/jupyterhub_config.py"
-ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="$final_path/config/jupyterhub_config.py"
-ynh_replace_string --match_string="__PORT_HUB__" --replace_string="$port_hub" --target_file="$final_path/config/jupyterhub_config.py"
-ynh_replace_string --match_string="__PORT_HTTP_PROXY__" --replace_string="$port_http_proxy" --target_file="$final_path/config/jupyterhub_config.py"
-ynh_replace_string --match_string="__FINAL_PATH__" --replace_string="$final_path" --target_file="$final_path/config/jupyterhub_config.py"
-ynh_replace_string --match_string="__ADMIN__" --replace_string="$admin" --target_file="$final_path/config/jupyterhub_config.py"
+# cp -f ../conf/jupyterhub_config.py $final_path/config/jupyterhub_config.py
+# ynh_replace_string --match_string="__URL__" --replace_string="https://$domain" --target_file="$final_path/config/jupyterhub_config.py"
+# ynh_replace_string --match_string="__PATH__" --replace_string="${path_url%/}" --target_file="$final_path/config/jupyterhub_config.py"
+# ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="$final_path/config/jupyterhub_config.py"
+# ynh_replace_string --match_string="__PORT_HUB__" --replace_string="$port_hub" --target_file="$final_path/config/jupyterhub_config.py"
+# ynh_replace_string --match_string="__PORT_HTTP_PROXY__" --replace_string="$port_http_proxy" --target_file="$final_path/config/jupyterhub_config.py"
+# ynh_replace_string --match_string="__FINAL_PATH__" --replace_string="$final_path" --target_file="$final_path/config/jupyterhub_config.py"
+# ynh_replace_string --match_string="__ADMIN__" --replace_string="$admin" --target_file="$final_path/config/jupyterhub_config.py"
 
-ynh_store_file_checksum --file="$final_path/config/jupyterhub_config.py"
+# ynh_store_file_checksum --file="$final_path/config/jupyterhub_config.py"
+
+ynh_add_config --template="../conf/jupyterhub_config.py" --destination="$final_path/config/jupyterhub_config.py"
 
 #=================================================
 # GENERIC FINALISATION
diff --git a/scripts/install b/scripts/install
index 7838a6b..217e0bb 100644
--- a/scripts/install
+++ b/scripts/install
@@ -135,28 +135,32 @@ ynh_add_systemd_config
 mkdir -p "$final_path/config"
 
 # JupyterHub configuration
-cp -f ../conf/jupyterhub_config.py $final_path/config/jupyterhub_config.py
+# cp -f ../conf/jupyterhub_config.py $final_path/config/jupyterhub_config.py
 
-ynh_replace_string --match_string="__URL__" --replace_string="https://$domain" --target_file="$final_path/config/jupyterhub_config.py"
-ynh_replace_string --match_string="__PATH__" --replace_string="${path_url%/}" --target_file="$final_path/config/jupyterhub_config.py"
-ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="$final_path/config/jupyterhub_config.py"
-ynh_replace_string --match_string="__PORT_HUB__" --replace_string="$port_hub" --target_file="$final_path/config/jupyterhub_config.py"
-ynh_replace_string --match_string="__PORT_HTTP_PROXY__" --replace_string="$port_http_proxy" --target_file="$final_path/config/jupyterhub_config.py"
-ynh_replace_string --match_string="__FINAL_PATH__" --replace_string="$final_path" --target_file="$final_path/config/jupyterhub_config.py"
-ynh_replace_string --match_string="__ADMIN__" --replace_string="$admin" --target_file="$final_path/config/jupyterhub_config.py"
+# ynh_replace_string --match_string="__URL__" --replace_string="https://$domain" --target_file="$final_path/config/jupyterhub_config.py"
+# ynh_replace_string --match_string="__PATH__" --replace_string="${path_url%/}" --target_file="$final_path/config/jupyterhub_config.py"
+# ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="$final_path/config/jupyterhub_config.py"
+# ynh_replace_string --match_string="__PORT_HUB__" --replace_string="$port_hub" --target_file="$final_path/config/jupyterhub_config.py"
+# ynh_replace_string --match_string="__PORT_HTTP_PROXY__" --replace_string="$port_http_proxy" --target_file="$final_path/config/jupyterhub_config.py"
+# ynh_replace_string --match_string="__FINAL_PATH__" --replace_string="$final_path" --target_file="$final_path/config/jupyterhub_config.py"
+# ynh_replace_string --match_string="__ADMIN__" --replace_string="$admin" --target_file="$final_path/config/jupyterhub_config.py"
+
+ynh_add_config --template="../conf/jupyterhub_config.py" --destination="$final_path/config/jupyterhub_config.py"
 
 # Jupyter notebook configuration
-cp -f ../conf/jupyter_notebook_config.py $final_path/config/jupyter_notebook_config.py
+# cp -f ../conf/jupyter_notebook_config.py $final_path/config/jupyter_notebook_config.py
 
-ynh_replace_string --match_string="__ENABLE_TERMINAL__" --replace_string="$enable_terminal" --target_file="$final_path/config/jupyter_notebook_config.py"
+# ynh_replace_string --match_string="__ENABLE_TERMINAL__" --replace_string="$enable_terminal" --target_file="$final_path/config/jupyter_notebook_config.py"
+
+ynh_add_config --template="../conf/jupyter_notebook_config.py" --destination="$final_path/config/jupyter_notebook_config.py"
 
 #=================================================
 # STORE THE CONFIG FILE CHECKSUM
 #=================================================
 
 # Calculate and store the config file checksum into the app settings
-ynh_store_file_checksum --file="$final_path/config/jupyterhub_config.py"
-ynh_store_file_checksum --file="$final_path/config/jupyter_notebook_config.py"
+# ynh_store_file_checksum --file="$final_path/config/jupyterhub_config.py"
+# ynh_store_file_checksum --file="$final_path/config/jupyter_notebook_config.py"
 
 #=================================================
 # GENERIC FINALIZATION
diff --git a/scripts/upgrade b/scripts/upgrade
index 3039fde..5cb4491 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -132,29 +132,33 @@ fi
 # STORE THE CONFIG FILE CHECKSUM
 #=================================================
 
-ynh_backup_if_checksum_is_different --file="$final_path/config/jupyterhub_config.py"
+#ynh_backup_if_checksum_is_different --file="$final_path/config/jupyterhub_config.py"
 
 mkdir -p "$final_path/config"
 
-cp -f ../conf/jupyterhub_config.py $final_path/config/jupyterhub_config.py
-ynh_replace_string --match_string="__URL__" --replace_string="https://$domain" --target_file="$final_path/config/jupyterhub_config.py"
-ynh_replace_string --match_string="__PATH__" --replace_string="${path_url%/}" --target_file="$final_path/config/jupyterhub_config.py"
-ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="$final_path/config/jupyterhub_config.py"
-ynh_replace_string --match_string="__PORT_HUB__" --replace_string="$port_hub" --target_file="$final_path/config/jupyterhub_config.py"
-ynh_replace_string --match_string="__PORT_HTTP_PROXY__" --replace_string="$port_http_proxy" --target_file="$final_path/config/jupyterhub_config.py"
-ynh_replace_string --match_string="__FINAL_PATH__" --replace_string="$final_path" --target_file="$final_path/config/jupyterhub_config.py"
-ynh_replace_string --match_string="__ADMIN__" --replace_string="$admin" --target_file="$final_path/config/jupyterhub_config.py"
+# cp -f ../conf/jupyterhub_config.py $final_path/config/jupyterhub_config.py
+# ynh_replace_string --match_string="__URL__" --replace_string="https://$domain" --target_file="$final_path/config/jupyterhub_config.py"
+# ynh_replace_string --match_string="__PATH__" --replace_string="${path_url%/}" --target_file="$final_path/config/jupyterhub_config.py"
+# ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="$final_path/config/jupyterhub_config.py"
+# ynh_replace_string --match_string="__PORT_HUB__" --replace_string="$port_hub" --target_file="$final_path/config/jupyterhub_config.py"
+# ynh_replace_string --match_string="__PORT_HTTP_PROXY__" --replace_string="$port_http_proxy" --target_file="$final_path/config/jupyterhub_config.py"
+# ynh_replace_string --match_string="__FINAL_PATH__" --replace_string="$final_path" --target_file="$final_path/config/jupyterhub_config.py"
+# ynh_replace_string --match_string="__ADMIN__" --replace_string="$admin" --target_file="$final_path/config/jupyterhub_config.py"
 
-# Recalculate and store the checksum of the file for the next upgrade.
-ynh_store_file_checksum --file="$final_path/config/jupyterhub_config.py"
+# # Recalculate and store the checksum of the file for the next upgrade.
+# ynh_store_file_checksum --file="$final_path/config/jupyterhub_config.py"
 
-ynh_backup_if_checksum_is_different --file="$final_path/config/jupyter_notebook_config.py"
+ynh_add_config --template="../conf/jupyterhub_config.py" --destination="$final_path/config/jupyterhub_config.py"
 
-cp -f ../conf/jupyter_notebook_config.py $final_path/config/jupyter_notebook_config.py
+#ynh_backup_if_checksum_is_different --file="$final_path/config/jupyter_notebook_config.py"
 
-ynh_replace_string --match_string="__ENABLE_TERMINAL__" --replace_string="$enable_terminal" --target_file="$final_path/config/jupyter_notebook_config.py"
+# cp -f ../conf/jupyter_notebook_config.py $final_path/config/jupyter_notebook_config.py
 
-ynh_store_file_checksum --file="$final_path/config/jupyter_notebook_config.py"
+# ynh_replace_string --match_string="__ENABLE_TERMINAL__" --replace_string="$enable_terminal" --target_file="$final_path/config/jupyter_notebook_config.py"
+
+# ynh_store_file_checksum --file="$final_path/config/jupyter_notebook_config.py"
+
+ynh_add_config --template="../conf/jupyter_notebook_config.py" --destination="$final_path/config/jupyter_notebook_config.py"
 
 #=================================================
 # SETUP SYSTEMD