diff --git a/manifest.json b/manifest.json
index 44a6aa9..2eb84bc 100644
--- a/manifest.json
+++ b/manifest.json
@@ -15,7 +15,7 @@
         "url": "http://example.com"
     },
     "requirements": {
-        "yunohost": ">= 3.7"
+        "yunohost": ">= 4.1.2"
     },
     "multi_instance": true,
     "services": [
diff --git a/scripts/install b/scripts/install
index 54d74a3..24f1a05 100755
--- a/scripts/install
+++ b/scripts/install
@@ -220,7 +220,8 @@ chown -R $app: $final_path
 
 # Set the app as temporarily public for curl call
 ynh_script_progression --message="Configuring SSOwat..." --time --weight=1
-ynh_app_setting_set --app=$app --key=skipped_uris --value="/"
+# Making the app public for curl
+ynh_permission_update --permission="main" --add="visitors"
 # Reload SSOwat config
 yunohost app ssowatconf
 
@@ -232,7 +233,7 @@ ynh_script_progression --message="Finalizing installation..." --time --weight=1
 ynh_local_curl "/INSTALL_PATH" "key1=value1" "key2=value2" "key3=value3"
 
 # Remove the public access
-ynh_app_setting_delete --app=$app --key=skipped_uris
+ynh_permission_update --permission="main" --remove="visitors"
 
 #=================================================
 # MODIFY A CONFIG FILE
@@ -339,11 +340,16 @@ if [ $is_public -eq 1 ]
 then
 	# Everyone can access the app.
 	# The "main" permission is automatically created before the install script.
-	ynh_permission_update --permission "main" --add "visitors"
+	ynh_permission_update --permission="main" --add="visitors"
 fi
 
 # Only the admin can access the admin panel of the app (if the app has an admin panel)
-ynh_permission_create --permission "admin" --url "/admin" --allowed $admin
+ynh_permission_create --permission="admin" --url="/admin" --allowed=$admin
+
+# Everyone can access to the api part
+# We don't want to display the tile in the sso so we put --show_tile="false"
+# And we don't want that the YunoHost Admin can remove visitors group to this permission, so we put --protected="true"
+ynh_permission_create --permission="api" --url "/api" --allowed="visitors" --show_tile="false" --protected="true"
 
 #=================================================
 # RELOAD NGINX
diff --git a/scripts/upgrade b/scripts/upgrade
index 544b891..93ca640 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -52,28 +52,22 @@ if [ -z "$final_path" ]; then
 	ynh_app_setting_set --app=$app --key=final_path --value=$final_path
 fi
 
-### If nobody installed your app before 3.7,
+### If nobody installed your app before 4.1,
 ### then you may safely remove these lines
 
 # Cleaning legacy permissions
-is_public=$(ynh_app_setting_get --app=$app --key=is_public)
+if ynh_legacy_permissions_exists; then
+	ynh_legacy_permissions_delete_all
 
-if [ -n "$is_public" ]; then
-	# Remove unprotected_uris
-	ynh_app_setting_delete --app=$app --key=unprotected_uris
-	# Remove protected_uris
-	ynh_app_setting_delete --app=$app --key=protected_uris
-
-	# Removing skipped/unprotected_uris under certain conditions, remove the visitors group added during the migration process of 3.7
-	# Remove skipped_uris. If the app was public, add visitors again to the main permission
-	if ynh_permission_has_user --permission=main --user=visitors
-	then
-		ynh_app_setting_delete --app=$app --key=skipped_uris
-		ynh_permission_update --permission "main" --add "visitors"
-	else
-		ynh_app_setting_delete --app=$app --key=skipped_uris
-	fi
 	ynh_app_setting_delete --app=$app --key=is_public
+
+	# Create the required permissions
+	ynh_permission_create --permission="admin" --url="/admin" --allowed=$admin
+fi
+
+# Create a permission if needed
+if ! ynh_permission_exists --permission="api"; then
+	ynh_permission_create --permission="api" --url "/api" --allowed="visitors" --show_tile="false" --protected="true"
 fi
 
 #=================================================
@@ -203,16 +197,6 @@ ynh_add_fail2ban_config --logpath="/var/log/nginx/${domain}-error.log" --failreg
 # Set permissions on app files
 chown -R root: $final_path
 
-#=================================================
-# SETUP SSOWAT
-#=================================================
-ynh_script_progression --message="Upgrading permissions configuration..." --time --weight=1
-
-# Create the admin permission if needed
-if ! ynh_permission_exists --permission "admin"; then
-	ynh_permission_create --permission "admin" --url "/admin" --allowed $admin
-fi
-
 #=================================================
 # START SYSTEMD SERVICE
 #=================================================