diff --git a/index.html b/index.html
index 7b8b3f7..a6abb32 100644
--- a/index.html
+++ b/index.html
@@ -218,7 +218,7 @@
 
         <li>Arbitrage in Perpetual Contracts (with <a class="authorlink" href="https://sites.google.com/view/mindai/home"
                 target="_blank">Min Dai</a> and <a class="authorlink" href="https://sg.linkedin.com/in/linfeng-li-263843184" target="_blank">Linfeng Li</a>).<br>
-            <b>submitted</b>. <span class="links">[<a class="paperlink" href="" onclick="toggleAbstract('abs_arbPerp');return false">Abstract</a>|<a class="paperlink"
+            <b>submitted</b>. Updated: August 2025. <span class="links">[<a class="paperlink" href="" onclick="toggleAbstract('abs_arbPerp');return false">Abstract</a>|<a class="paperlink"
                 href="https://papers.ssrn.com/sol3/papers.cfm?abstract_id=5262988" target="_blank">SSRN</a>]</span><br>
             <div class="fade-in" style="display:none" id="abs_arbPerp">
                 <hr>