diff --git a/src/components/structures/VectorEmbeddedPage.js b/src/components/structures/VectorEmbeddedPage.tsx
similarity index 98%
rename from src/components/structures/VectorEmbeddedPage.js
rename to src/components/structures/VectorEmbeddedPage.tsx
index 2397eef144..85adb2fb3f 100644
--- a/src/components/structures/VectorEmbeddedPage.js
+++ b/src/components/structures/VectorEmbeddedPage.tsx
@@ -24,7 +24,7 @@ export default class VectorEmbeddedPage extends EmbeddedPage {
     static replaces = 'EmbeddedPage';
 
     // we're overriding the base component here, for Element-specific tweaks
-    translate(s) {
+    translate(s: string) {
         s = sanitizeHtml(_t(s));
         // ugly fix for https://github.com/vector-im/element-web/issues/4243
         // eslint-disable-next-line max-len
diff --git a/src/components/views/auth/VectorAuthFooter.js b/src/components/views/auth/VectorAuthFooter.tsx
similarity index 100%
rename from src/components/views/auth/VectorAuthFooter.js
rename to src/components/views/auth/VectorAuthFooter.tsx
diff --git a/src/components/views/auth/VectorAuthHeaderLogo.js b/src/components/views/auth/VectorAuthHeaderLogo.tsx
similarity index 92%
rename from src/components/views/auth/VectorAuthHeaderLogo.js
rename to src/components/views/auth/VectorAuthHeaderLogo.tsx
index 73f952e525..d3bf32341b 100644
--- a/src/components/views/auth/VectorAuthHeaderLogo.js
+++ b/src/components/views/auth/VectorAuthHeaderLogo.tsx
@@ -16,16 +16,11 @@ limitations under the License.
 */
 
 import React from 'react';
-import PropTypes from 'prop-types';
 import SdkConfig from 'matrix-react-sdk/src/SdkConfig';
 
 export default class VectorAuthHeaderLogo extends React.PureComponent {
     static replaces = 'AuthHeaderLogo'
 
-    static propTypes = {
-        icon: PropTypes.string,
-    }
-
     render() {
         const brandingConfig = SdkConfig.get().branding;
         let logoUrl = "themes/element/img/logos/element-logo.svg";
diff --git a/src/components/views/auth/VectorAuthPage.js b/src/components/views/auth/VectorAuthPage.tsx
similarity index 93%
rename from src/components/views/auth/VectorAuthPage.js
rename to src/components/views/auth/VectorAuthPage.tsx
index 19fd618073..b50c401f99 100644
--- a/src/components/views/auth/VectorAuthPage.js
+++ b/src/components/views/auth/VectorAuthPage.tsx
@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import React from 'react';
+import React, { CSSProperties } from 'react';
 import * as sdk from 'matrix-react-sdk/src/index';
 import SdkConfig from 'matrix-react-sdk/src/SdkConfig';
 
@@ -48,12 +48,12 @@ export default class VectorAuthPage extends React.PureComponent {
             background: `center/cover fixed url(${VectorAuthPage.getWelcomeBackgroundUrl()})`,
         };
 
-        const modalStyle = {
+        const modalStyle: CSSProperties = {
             position: 'relative',
             background: 'initial',
         };
 
-        const blurStyle = {
+        const blurStyle: CSSProperties = {
             position: 'absolute',
             top: 0,
             right: 0,
@@ -63,7 +63,7 @@ export default class VectorAuthPage extends React.PureComponent {
             background: pageStyle.background,
         };
 
-        const modalContentStyle = {
+        const modalContentStyle: CSSProperties = {
             display: 'flex',
             zIndex: 1,
             background: 'rgba(255, 255, 255, 0.59)',