diff --git a/web/assets/js/captcha_refresh.js b/web/assets/js/captcha_refresh.js
index a7cb54a..72065ad 100755
--- a/web/assets/js/captcha_refresh.js
+++ b/web/assets/js/captcha_refresh.js
@@ -25,13 +25,13 @@ captcha_refresh.addEventListener("click", async e => {
 	e.target.disabled = true;
 	setTimeout(async () => {
 		e.target.disabled = false;
-		await fetch(`/api/captcha/${g_current_captcha_id}?remove`); }, 3000);
+		await fetch(`/api/captcha/${g_current_captcha_id}?remove`, { method: "POST"}); }, 3000);
 	e_captcha.children[2].value = "";
 	await getNewCaptcha();
 });
 
 // Remove unused CAPTCHA on a server.
-window.addEventListener("unload", () => fetch(`/api/captcha/${g_current_captcha_id}?remove`));
+window.addEventListener("unload", () => fetch(`/api/captcha/${g_current_captcha_id}?remove`, { method: "POST"}));
 
 setInterval(async () => {
 	captcha_remain.innerText = --g_captcha_timeout_remain;