diff --git a/racket-webview.rkt b/racket-webview.rkt
index 7dbf010..98409b6 100644
--- a/racket-webview.rkt
+++ b/racket-webview.rkt
@@ -704,6 +704,9 @@
                                       #:not-exist [on-not-exist (λ (file base-path path) path)]
                                       )
   (λ (file)
+    (let* ((idx (string-find file "?")))
+      (unless (eq? idx #f)
+        (set! file (substring file 0 idx))))
     (let ((f (if (string=? file "/") "index.html" file)))
       (when (string-prefix? f "/")
         (set! f (substring f 1)))