diff --git a/src/components/views/auth/CaptchaForm.tsx b/src/components/views/auth/CaptchaForm.tsx
index f7386be5b0..d71d8a6b15 100644
--- a/src/components/views/auth/CaptchaForm.tsx
+++ b/src/components/views/auth/CaptchaForm.tsx
@@ -23,7 +23,7 @@ const DIV_ID = 'mx_recaptcha';
 
 interface IProps {
     sitePublicKey?: string;
-    onCaptchaResponse: () => void;
+    onCaptchaResponse: (response: string) => void;
 }
 
 interface IState {
diff --git a/src/components/views/auth/CountryDropdown.tsx b/src/components/views/auth/CountryDropdown.tsx
index 2e85356e38..e0eed5b430 100644
--- a/src/components/views/auth/CountryDropdown.tsx
+++ b/src/components/views/auth/CountryDropdown.tsx
@@ -160,13 +160,3 @@ export default class CountryDropdown extends React.Component<IProps, IState> {
         </Dropdown>;
     }
 }
-
-CountryDropdown.propTypes = {
-    className: PropTypes.string,
-    isSmall: PropTypes.bool,
-    // if isSmall, show +44 in the selected value
-    showPrefix: PropTypes.bool,
-    onOptionChange: PropTypes.func.isRequired,
-    value: PropTypes.string,
-    disabled: PropTypes.bool,
-};
diff --git a/src/components/views/auth/Welcome.js b/src/components/views/auth/Welcome.tsx
similarity index 93%
rename from src/components/views/auth/Welcome.js
rename to src/components/views/auth/Welcome.tsx
index e3f7a601f2..1b02d0d2b5 100644
--- a/src/components/views/auth/Welcome.js
+++ b/src/components/views/auth/Welcome.tsx
@@ -29,15 +29,19 @@ import { replaceableComponent } from "../../../utils/replaceableComponent";
 // translatable strings for Welcome pages
 _td("Sign in with SSO");
 
+interface IProps {
+
+}
+
 @replaceableComponent("views.auth.Welcome")
-export default class Welcome extends React.PureComponent {
-    constructor(props) {
+export default class Welcome extends React.PureComponent<IProps> {
+    constructor(props: IProps) {
         super(props);
 
         CountlyAnalytics.instance.track("onboarding_welcome");
     }
 
-    render() {
+    public render(): React.ReactNode {
         const EmbeddedPage = sdk.getComponent('structures.EmbeddedPage');
         const LanguageSelector = sdk.getComponent('auth.LanguageSelector');