diff --git a/docs/conf.py b/docs/conf.py
index fa0f2da368..1997510129 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -326,7 +326,7 @@ def write_new():
 # so a file named "default.css" will overwrite the builtin "default.css".
 html_static_path = ["_static"]
 html_css_files = ["css/custom.css"]
-html_js_files = ["js/custom.js", "js/scorer.js", "language_data.js"]
+html_js_files = ["js/custom.js", "js/scorer.js", "language_data.js", "searchtools.js"]
 
 # Add any extra paths that contain custom files (such as robots.txt or
 # .htaccess) here, relative to this directory. These files are copied