diff --git a/scripts/install b/scripts/install
index 3d7d147..5a64668 100755
--- a/scripts/install
+++ b/scripts/install
@@ -206,6 +206,9 @@ then
 	ynh_permission_update --permission="main" --add="visitors"
 fi
 
+# Permission to make link-sharing work
+ynh_permission_create --permission="sharing" --url="/s" --allowed="visitors" --show_tile="false" --protected="true"
+
 #=================================================
 # RELOAD NGINX
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index d50ebd9..0973d46 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -70,6 +70,11 @@ if [ -z "$language_key" ]; then
 	ynh_app_setting_delete --app=$app --key=language
 fi
 
+# Create sharing permission if needed
+if ! ynh_permission_exists --permission="sharing"; then
+	ynh_permission_create --permission="sharing" --url="/s" --allowed="visitors" --show_tile="false" --protected="true"
+fi
+
 #=================================================
 # CREATE DEDICATED USER
 #=================================================