diff --git a/research-group-presi/slides.html b/research-group-presi/slides.html
index 28fbd33c74d83040464b394ce9e27ee2446bab52..4802d5f4e31003562113d8979d04f2d0261f1bcc 100644
--- a/research-group-presi/slides.html
+++ b/research-group-presi/slides.html
@@ -479,7 +479,9 @@ deleted hidden filters: 384</code></pre>
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           { src: 'reveal.js/plugin/zoom-js/zoom.js', async: true },
               { src: 'reveal.js/plugin/notes/notes.js', async: true }
-        ]
+        ],
+
+        slideNumber: true
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     </body>