diff --git a/Gruntfile.js b/Gruntfile.js
index de6f3c9b745806cac2cafaf7b514d12d58e1862d..3d4968ab1ff1ba4d652cdd7d492e89c1c474f3f3 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -71,6 +71,8 @@ module.exports = grunt => {
             `--variable=revealjs-url:${relative(dirname(pres), "./reveal.js")}`,
             "--variable=theme:irstea",
             "--variable=history:true",
+            "--variable=navigationMode:linear",
+            "--variable=fragmentInURL:true",
             env === "dev" &&
               `--variable=header-includes:"<script src='//${PUBLIC_HOST}:${LIVERELOAD_PORT}/livereload.js'></script>"`
           ]