diff --git a/frontend/src/ts/controllers/account-controller.ts b/frontend/src/ts/controllers/account-controller.ts
index 2cf35af04..a56ae49b0 100644
--- a/frontend/src/ts/controllers/account-controller.ts
+++ b/frontend/src/ts/controllers/account-controller.ts
@@ -581,8 +581,8 @@ async function signUp(): Promise<void> {
     return;
   }
   RegisterCaptchaPopup.show();
-  const captcha = await RegisterCaptchaPopup.promise;
-  if (!captcha) {
+  const captchaToken = await RegisterCaptchaPopup.promise;
+  if (!captchaToken) {
     Notifications.add("Please complete the captcha", -1);
     return;
   }
@@ -662,7 +662,7 @@ async function signUp(): Promise<void> {
 
     const signInResponse = await Ape.users.create(
       nname,
-      captcha,
+      captchaToken,
       email,
       createdAuthUser.user.uid
     );
diff --git a/frontend/src/ts/controllers/captcha-controller.ts b/frontend/src/ts/controllers/captcha-controller.ts
index 18f3cd0b4..9d56ebe62 100644
--- a/frontend/src/ts/controllers/captcha-controller.ts
+++ b/frontend/src/ts/controllers/captcha-controller.ts
@@ -5,7 +5,7 @@ const captchas: Record<string, number> = {};
 export function render(
   element: HTMLElement,
   id: string,
-  callback?: (data: any) => void
+  callback?: (responseToken: string) => void
 ): void {
   if (captchas[id] !== undefined && captchas[id] !== null) {
     return;
diff --git a/frontend/src/ts/popups/register-captcha-popup.ts b/frontend/src/ts/popups/register-captcha-popup.ts
index 2883820a9..1d4b12eb6 100644
--- a/frontend/src/ts/popups/register-captcha-popup.ts
+++ b/frontend/src/ts/popups/register-captcha-popup.ts
@@ -4,7 +4,7 @@ import * as Skeleton from "./skeleton";
 
 const wrapperId = "registerCaptchaPopupWrapper";
 
-let resolvePromise: (data?: string) => void;
+let resolvePromise: (token?: string) => void;
 
 export let promise: Promise<string | undefined> = new Promise((resolve) => {
   resolvePromise = resolve;
@@ -20,8 +20,8 @@ export function show(): void {
     CaptchaController.render(
       $("#registerCaptchaPopup .g-recaptcha")[0],
       "register",
-      (data) => {
-        resolvePromise(data);
+      (token) => {
+        resolvePromise(token);
         hide();
       }
     );