diff --git a/sphinx/themes/basic/search.html b/sphinx/themes/basic/search.html
index 5ba3c017e3..e492b8d37e 100644
--- a/sphinx/themes/basic/search.html
+++ b/sphinx/themes/basic/search.html
@@ -37,7 +37,7 @@ <h1 id="search-documentation">{{ _('Search') }}</h1>
   {% endblock %}
   {% block searchbox %}
   <form action="" method="get">
-    <input type="text" name="q" aria-labelledby="search-documentation" value="" />
+    <input type="text" name="q" aria-labelledby="search-documentation" value="" autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false"/>
     <input type="submit" value="{{ _('search') }}" />
     <span id="search-progress" style="padding-left: 10px"></span>
   </form>
diff --git a/sphinx/themes/basic/searchbox.html b/sphinx/themes/basic/searchbox.html
index 68f933f660..e0094cd788 100644
--- a/sphinx/themes/basic/searchbox.html
+++ b/sphinx/themes/basic/searchbox.html
@@ -12,7 +12,7 @@
   <h3 id="searchlabel">{{ _('Quick search') }}</h3>
     <div class="searchformwrapper">
     <form class="search" action="{{ pathto('search') }}" method="get">
-      <input type="text" name="q" aria-labelledby="searchlabel" />
+      <input type="text" name="q" aria-labelledby="searchlabel" autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false"/>
       <input type="submit" value="{{ _('Go') }}" />
     </form>
     </div>