diff --git a/packages/lit-dev-content/site/_includes/site-nav.html b/packages/lit-dev-content/site/_includes/site-nav.html
index a5a84b15c..0d06df362 100644
--- a/packages/lit-dev-content/site/_includes/site-nav.html
+++ b/packages/lit-dev-content/site/_includes/site-nav.html
@@ -2,7 +2,7 @@
    <a href="{{ site.baseurl }}/docs/">Documentation</a>
 
    <litdev-version-selector>
-      <select name="version">
+      <select name="version" autocomplete="off">
         {% for version, versionData in versions %}
           <option value="{{ version }}"
             {% if version == selectedVersion %}