diff --git a/homepage/static/assets/js/captcha_refresh.js b/homepage/static/assets/js/captcha_refresh.js
index 47dcbc2..6f686af 100644
--- a/homepage/static/assets/js/captcha_refresh.js
+++ b/homepage/static/assets/js/captcha_refresh.js
@@ -33,12 +33,13 @@ captcha_refresh.addEventListener("click", async e => {
     captcha_refresh.disabled = true;
     setTimeout(async () => {
         captcha_refresh.disabled = false;
-        await fetch(`/captcha/${g_current_captcha_id}`); }, 3000);
+        await fetch(`/captcha/${g_current_captcha_id}?remove`); }, 3000);
+    document.getElementsByName("captcha_answer")[0].value = "";
     await getNewCaptcha();
 });
 
 // Remove unused CAPTCHA on a server.
-window.addEventListener("unload", () => fetch(`/captcha/${g_current_captcha_id}`));
+window.addEventListener("unload", () => fetch(`/captcha/${g_current_captcha_id}?remove`));
 
 setInterval(async () => {
     captcha_remain.innerText = --g_captcha_timeout_remain;