diff --git a/src/Lifecycle.ts b/src/Lifecycle.ts
index 61ded93833..410124a637 100644
--- a/src/Lifecycle.ts
+++ b/src/Lifecycle.ts
@@ -21,6 +21,7 @@ import { createClient } from 'matrix-js-sdk/src/matrix';
 import { InvalidStoreError } from "matrix-js-sdk/src/errors";
 import { MatrixClient } from "matrix-js-sdk/src/client";
 import { decryptAES, encryptAES, IEncryptedPayload } from "matrix-js-sdk/src/crypto/aes";
+import { QueryDict } from 'matrix-js-sdk/src/utils';
 
 import { IMatrixClientCreds, MatrixClientPeg } from './MatrixClientPeg';
 import SecurityCustomisations from "./customisations/Security";
@@ -65,7 +66,7 @@ interface ILoadSessionOpts {
     guestIsUrl?: string;
     ignoreGuest?: boolean;
     defaultDeviceDisplayName?: string;
-    fragmentQueryParams?: Record<string, string>;
+    fragmentQueryParams?: QueryDict;
 }
 
 /**
@@ -118,8 +119,8 @@ export async function loadSession(opts: ILoadSessionOpts = {}): Promise<boolean>
         ) {
             console.log("Using guest access credentials");
             return doSetLoggedIn({
-                userId: fragmentQueryParams.guest_user_id,
-                accessToken: fragmentQueryParams.guest_access_token,
+                userId: fragmentQueryParams.guest_user_id as string,
+                accessToken: fragmentQueryParams.guest_access_token as string,
                 homeserverUrl: guestHsUrl,
                 identityServerUrl: guestIsUrl,
                 guest: true,
@@ -173,7 +174,7 @@ export async function getStoredSessionOwner(): Promise<[string, boolean]> {
  *    login, else false
  */
 export function attemptTokenLogin(
-    queryParams: Record<string, string>,
+    queryParams: QueryDict,
     defaultDeviceDisplayName?: string,
     fragmentAfterLogin?: string,
 ): Promise<boolean> {
@@ -198,7 +199,7 @@ export function attemptTokenLogin(
         homeserver,
         identityServer,
         "m.login.token", {
-            token: queryParams.loginToken,
+            token: queryParams.loginToken as string,
             initial_device_display_name: defaultDeviceDisplayName,
         },
     ).then(function(creds) {
diff --git a/src/components/structures/MatrixChat.tsx b/src/components/structures/MatrixChat.tsx
index 15536f260d..785838ffca 100644
--- a/src/components/structures/MatrixChat.tsx
+++ b/src/components/structures/MatrixChat.tsx
@@ -19,7 +19,7 @@ import { createClient } from "matrix-js-sdk/src/matrix";
 import { InvalidStoreError } from "matrix-js-sdk/src/errors";
 import { RoomMember } from "matrix-js-sdk/src/models/room-member";
 import { MatrixEvent } from "matrix-js-sdk/src/models/event";
-import { sleep, defer, IDeferred } from "matrix-js-sdk/src/utils";
+import { sleep, defer, IDeferred, QueryDict } from "matrix-js-sdk/src/utils";
 
 // focus-visible is a Polyfill for the :focus-visible CSS pseudo-attribute used by _AccessibleButton.scss
 import 'focus-visible';
@@ -155,7 +155,7 @@ const ONBOARDING_FLOW_STARTERS = [
 
 interface IScreen {
     screen: string;
-    params?: object;
+    params?: QueryDict;
 }
 
 /* eslint-disable camelcase */
@@ -185,9 +185,9 @@ interface IProps { // TODO type things better
     onNewScreen: (screen: string, replaceLast: boolean) => void;
     enableGuest?: boolean;
     // the queryParams extracted from the [real] query-string of the URI
-    realQueryParams?: Record<string, string>;
+    realQueryParams?: QueryDict;
     // the initial queryParams extracted from the hash-fragment of the URI
-    startingFragmentQueryParams?: Record<string, string>;
+    startingFragmentQueryParams?: QueryDict;
     // called when we have completed a token login
     onTokenLoginCompleted?: () => void;
     // Represents the screen to display as a result of parsing the initial window.location
@@ -195,7 +195,7 @@ interface IProps { // TODO type things better
     // displayname, if any, to set on the device when logging in/registering.
     defaultDeviceDisplayName?: string;
     // A function that makes a registration URL
-    makeRegistrationUrl: (object) => string;
+    makeRegistrationUrl: (params: QueryDict) => string;
 }
 
 interface IState {
@@ -298,7 +298,7 @@ export default class MatrixChat extends React.PureComponent<IProps, IState> {
             if (this.screenAfterLogin.screen.startsWith("room/") && params['signurl'] && params['email']) {
                 // probably a threepid invite - try to store it
                 const roomId = this.screenAfterLogin.screen.substring("room/".length);
-                ThreepidInviteStore.instance.storeInvite(roomId, params as IThreepidInviteWireFormat);
+                ThreepidInviteStore.instance.storeInvite(roomId, params as unknown as IThreepidInviteWireFormat);
             }
         }
 
@@ -1952,7 +1952,7 @@ export default class MatrixChat extends React.PureComponent<IProps, IState> {
         this.setState({ serverConfig });
     };
 
-    private makeRegistrationUrl = (params: {[key: string]: string}) => {
+    private makeRegistrationUrl = (params: QueryDict) => {
         if (this.props.startingFragmentQueryParams.referrer) {
             params.referrer = this.props.startingFragmentQueryParams.referrer;
         }
@@ -2107,7 +2107,7 @@ export default class MatrixChat extends React.PureComponent<IProps, IState> {
                     onForgotPasswordClick={showPasswordReset ? this.onForgotPasswordClick : undefined}
                     onServerConfigChange={this.onServerConfigChange}
                     fragmentAfterLogin={fragmentAfterLogin}
-                    defaultUsername={this.props.startingFragmentQueryParams.defaultUsername}
+                    defaultUsername={this.props.startingFragmentQueryParams.defaultUsername as string}
                     {...this.getServerProperties()}
                 />
             );
diff --git a/src/components/views/elements/AppTile.js b/src/components/views/elements/AppTile.js
index 1ddca61c22..7e98537180 100644
--- a/src/components/views/elements/AppTile.js
+++ b/src/components/views/elements/AppTile.js
@@ -39,7 +39,6 @@ import { MatrixCapabilities } from "matrix-widget-api";
 import RoomWidgetContextMenu from "../context_menus/WidgetContextMenu";
 import WidgetAvatar from "../avatars/WidgetAvatar";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
-import { urlSearchParamsToObject } from "../../../utils/UrlUtils";
 
 @replaceableComponent("views.elements.AppTile")
 export default class AppTile extends React.Component {