diff --git a/index.html b/index.html
index abc48c2..7b593d5 100644
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+++ b/index.html
@@ -69,7 +69,7 @@ <h2>Organizers</h2>
             Karlsruhe Institute of Technology (KIT)
         </a>
         <a href="https://mathphyssim.github.io/" style="flex: 1;">
-            <img src="assets/organizer_simon_hirlaender.jpg" alt="Simon Hirländer" style="width: 100%; border-radius: 9999px;">
+            <img src="assets/organizer_simon_hirlaender.jpeg" alt="Simon Hirlaender" style="width: 100%; border-radius: 9999px;">
             <b>Simon Hirlaender</b> <br>
             University of Salzburg
         </a>