diff --git a/src/components/structures/LoggedInView.js b/src/components/structures/LoggedInView.js
index d9980aeca6..36beec3f6c 100644
--- a/src/components/structures/LoggedInView.js
+++ b/src/components/structures/LoggedInView.js
@@ -1,7 +1,7 @@
 /*
 Copyright 2015, 2016 OpenMarket Ltd
 Copyright 2017 Vector Creations Ltd
-Copyright 2017, 2018 New Vector Ltd
+Copyright 2017, 2018, 2020 New Vector Ltd
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -17,8 +17,7 @@ limitations under the License.
 */
 
 import { MatrixClient } from 'matrix-js-sdk';
-import React, {createRef} from 'react';
-import createReactClass from 'create-react-class';
+import React, {createRef, PureComponent} from 'react';
 import PropTypes from 'prop-types';
 import { DragDropContext } from 'react-beautiful-dnd';
 
@@ -61,10 +60,10 @@ function canElementReceiveInput(el) {
  *
  * Components mounted below us can access the matrix client via the react context.
  */
-const LoggedInView = createReactClass({
-    displayName: 'LoggedInView',
+class LoggedInView extends PureComponent {
+    static displayName = 'LoggedInView';
 
-    propTypes: {
+    static propTypes = {
         matrixClient: PropTypes.instanceOf(MatrixClient).isRequired,
         page_type: PropTypes.string.isRequired,
         onRoomCreated: PropTypes.func,
@@ -77,25 +76,18 @@ const LoggedInView = createReactClass({
         viaServers: PropTypes.arrayOf(PropTypes.string),
 
         // and lots and lots of other stuff.
-    },
+    };
 
-    getInitialState: function() {
-        return {
+    constructor(props, context) {
+        super(props, context);
+
+        this.state = {
             // use compact timeline view
             useCompactLayout: SettingsStore.getValue('useCompactLayout'),
             // any currently active server notice events
             serverNoticeEvents: [],
         };
-    },
 
-    componentDidMount: function() {
-        this.resizer = this._createResizer();
-        this.resizer.attach();
-        this._loadResizerPreferences();
-    },
-
-    // TODO: [REACT-WARNING] Replace component with real class, use constructor for refs
-    UNSAFE_componentWillMount: function() {
         // stash the MatrixClient in case we log out before we are unmounted
         this._matrixClient = this.props.matrixClient;
 
@@ -118,7 +110,13 @@ const LoggedInView = createReactClass({
         fixupColorFonts();
 
         this._roomView = createRef();
-    },
+    }
+
+    componentDidMount() {
+        this.resizer = this._createResizer();
+        this.resizer.attach();
+        this._loadResizerPreferences();
+    }
 
     componentDidUpdate(prevProps) {
         // attempt to guess when a banner was opened or closed
@@ -130,9 +128,9 @@ const LoggedInView = createReactClass({
         ) {
             this.props.resizeNotifier.notifyBannersChanged();
         }
-    },
+    }
 
-    componentWillUnmount: function() {
+    componentWillUnmount() {
         document.removeEventListener('keydown', this._onNativeKeyDown, false);
         this._matrixClient.removeListener("accountData", this.onAccountData);
         this._matrixClient.removeListener("sync", this.onSync);
@@ -141,7 +139,7 @@ const LoggedInView = createReactClass({
             this._sessionStoreToken.remove();
         }
         this.resizer.detach();
-    },
+    }
 
     // Child components assume that the client peg will not be null, so give them some
     // sort of assurance here by only allowing a re-render if the client is truthy.
@@ -149,22 +147,22 @@ const LoggedInView = createReactClass({
     // This is required because `LoggedInView` maintains its own state and if this state
     // updates after the client peg has been made null (during logout), then it will
     // attempt to re-render and the children will throw errors.
-    shouldComponentUpdate: function() {
+    shouldComponentUpdate() {
         return Boolean(MatrixClientPeg.get());
-    },
+    }
 
-    canResetTimelineInRoom: function(roomId) {
+    canResetTimelineInRoom = (roomId) => {
         if (!this._roomView.current) {
             return true;
         }
         return this._roomView.current.canResetTimeline();
-    },
+    };
 
-    _setStateFromSessionStore() {
+    _setStateFromSessionStore = () => {
         this.setState({
             userHasGeneratedPassword: Boolean(this._sessionStore.getCachedPassword()),
         });
-    },
+    };
 
     _createResizer() {
         const classNames = {
@@ -193,7 +191,7 @@ const LoggedInView = createReactClass({
             collapseConfig);
         resizer.setClassNames(classNames);
         return resizer;
-    },
+    }
 
     _loadResizerPreferences() {
         let lhsSize = window.localStorage.getItem("mx_lhs_size");
@@ -203,9 +201,9 @@ const LoggedInView = createReactClass({
             lhsSize = 350;
         }
         this.resizer.forHandleAt(0).resize(lhsSize);
-    },
+    }
 
-    onAccountData: function(event) {
+    onAccountData = (event) => {
         if (event.getType() === "im.vector.web.settings") {
             this.setState({
                 useCompactLayout: event.getContent().useCompactLayout,
@@ -214,9 +212,9 @@ const LoggedInView = createReactClass({
         if (event.getType() === "m.ignored_user_list") {
             dis.dispatch({action: "ignore_state_changed"});
         }
-    },
+    };
 
-    onSync: function(syncState, oldSyncState, data) {
+    onSync = (syncState, oldSyncState, data) => {
         const oldErrCode = (
             this.state.syncErrorData &&
             this.state.syncErrorData.error &&
@@ -238,16 +236,16 @@ const LoggedInView = createReactClass({
         if (oldSyncState === 'PREPARED' && syncState === 'SYNCING') {
             this._updateServerNoticeEvents();
         }
-    },
+    };
 
-    onRoomStateEvents: function(ev, state) {
+    onRoomStateEvents = (ev, state) => {
         const roomLists = RoomListStore.getRoomLists();
         if (roomLists['m.server_notice'] && roomLists['m.server_notice'].some(r => r.roomId === ev.getRoomId())) {
             this._updateServerNoticeEvents();
         }
-    },
+    };
 
-    _updateServerNoticeEvents: async function() {
+    _updateServerNoticeEvents = async () => {
         const roomLists = RoomListStore.getRoomLists();
         if (!roomLists['m.server_notice']) return [];
 
@@ -267,9 +265,9 @@ const LoggedInView = createReactClass({
         this.setState({
             serverNoticeEvents: pinnedEvents,
         });
-    },
+    };
 
-    _onPaste: function(ev) {
+    _onPaste = (ev) => {
         let canReceiveInput = false;
         let element = ev.target;
         // test for all parents because the target can be a child of a contenteditable element
@@ -283,7 +281,7 @@ const LoggedInView = createReactClass({
             // so dispatch synchronously before paste happens
             dis.dispatch({action: 'focus_composer'}, true);
         }
-    },
+    };
 
     /*
     SOME HACKERY BELOW:
@@ -307,22 +305,22 @@ const LoggedInView = createReactClass({
     We also listen with a native listener on the document to get keydown events when no element is focused.
     Bubbling is irrelevant here as the target is the body element.
     */
-    _onReactKeyDown: function(ev) {
+    _onReactKeyDown = (ev) => {
         // events caught while bubbling up on the root element
         // of this component, so something must be focused.
         this._onKeyDown(ev);
-    },
+    };
 
-    _onNativeKeyDown: function(ev) {
+    _onNativeKeyDown = (ev) => {
         // only pass this if there is no focused element.
         // if there is, _onKeyDown will be called by the
         // react keydown handler that respects the react bubbling order.
         if (ev.target === document.body) {
             this._onKeyDown(ev);
         }
-    },
+    };
 
-    _onKeyDown: function(ev) {
+    _onKeyDown = (ev) => {
             /*
             // Remove this for now as ctrl+alt = alt-gr so this breaks keyboards which rely on alt-gr for numbers
             // Will need to find a better meta key if anyone actually cares about using this.
@@ -432,19 +430,19 @@ const LoggedInView = createReactClass({
                 // that would prevent typing in the now-focussed composer
             }
         }
-    },
+    };
 
     /**
      * dispatch a page-up/page-down/etc to the appropriate component
      * @param {Object} ev The key event
      */
-    _onScrollKeyPressed: function(ev) {
+    _onScrollKeyPressed = (ev) => {
         if (this._roomView.current) {
             this._roomView.current.handleScrollKey(ev);
         }
-    },
+    };
 
-    _onDragEnd: function(result) {
+    _onDragEnd = (result) => {
         // Dragged to an invalid destination, not onto a droppable
         if (!result.destination) {
             return;
@@ -467,9 +465,9 @@ const LoggedInView = createReactClass({
         } else if (dest.startsWith('room-sub-list-droppable_')) {
             this._onRoomTileEndDrag(result);
         }
-    },
+    };
 
-    _onRoomTileEndDrag: function(result) {
+    _onRoomTileEndDrag = (result) => {
         let newTag = result.destination.droppableId.split('_')[1];
         let prevTag = result.source.droppableId.split('_')[1];
         if (newTag === 'undefined') newTag = undefined;
@@ -486,9 +484,9 @@ const LoggedInView = createReactClass({
             prevTag, newTag,
             oldIndex, newIndex,
         ), true);
-    },
+    };
 
-    _onMouseDown: function(ev) {
+    _onMouseDown = (ev) => {
         // When the panels are disabled, clicking on them results in a mouse event
         // which bubbles to certain elements in the tree. When this happens, close
         // any settings page that is currently open (user/room/group).
@@ -507,9 +505,9 @@ const LoggedInView = createReactClass({
                 });
             }
         }
-    },
+    };
 
-    _onMouseUp: function(ev) {
+    _onMouseUp = (ev) => {
         if (!this.state.mouseDown) return;
 
         const deltaX = ev.pageX - this.state.mouseDown.x;
@@ -528,13 +526,13 @@ const LoggedInView = createReactClass({
         // Always clear the mouseDown state to ensure we don't accidentally
         // use stale values due to the mouseDown checks.
         this.setState({mouseDown: null});
-    },
+    };
 
-    _setResizeContainerRef(div) {
+    _setResizeContainerRef = (div) => {
         this.resizeContainer = div;
-    },
+    };
 
-    render: function() {
+    render() {
         const LeftPanel = sdk.getComponent('structures.LeftPanel');
         const RoomView = sdk.getComponent('structures.RoomView');
         const UserView = sdk.getComponent('structures.UserView');
@@ -660,7 +658,7 @@ const LoggedInView = createReactClass({
                 </div>
             </MatrixClientContext.Provider>
         );
-    },
-});
+    }
+}
 
 export default LoggedInView;