diff --git a/e107_themes/bootstrap5/theme.html b/e107_themes/bootstrap5/theme.html
index e5ae93a66..9a38331ed 100644
--- a/e107_themes/bootstrap5/theme.html
+++ b/e107_themes/bootstrap5/theme.html
@@ -3,7 +3,7 @@
 <nav class="navbar navbar-expand-lg navbar-dark bg-dark fixed-top">
     <div class="container">
       <a class="navbar-brand" href="{SITEURL}">{SITENAME}</a>
-      <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarResponsive" aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation">
+      <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarResponsive" aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation">
         <span class="navbar-toggler-icon"></span>
       </button>
       <div class="collapse navbar-collapse" id="navbarResponsive">