diff --git a/src/components/Admintools.jsx b/src/components/Admintools.jsx
index c056278..feeae24 100644
--- a/src/components/Admintools.jsx
+++ b/src/components/Admintools.jsx
@@ -4,10 +4,10 @@
  */
 
 import React, { useState, useEffect } from 'react';
-import { connect } from 'react-redux';
+import { useSelector, shallowEqual } from 'react-redux';
 import { t } from 'ttag';
 
-import type { State } from '../reducers';
+import { getToday } from '../core/utils';
 
 const keptState = {
   coords: null,
@@ -146,19 +146,10 @@ async function submitMakeMod(
 }
 
 
-function Admintools({
-  canvasId,
-  canvases,
-  userlvl,
-}) {
-  const curDate = new Date();
-  let day = curDate.getDate();
-  let month = curDate.getMonth() + 1;
-  if (month < 10) month = `0${month}`;
-  if (day < 10) day = `0${day}`;
-  const maxDate = `${curDate.getFullYear()}-${month}-${day}`;
+function Admintools() {
+  const maxDate = getToday();
 
-  const [selectedCanvas, selectCanvas] = useState(canvasId);
+  const [selectedCanvas, selectCanvas] = useState(0);
   const [imageAction, selectImageAction] = useState('build');
   const [iPAction, selectIPAction] = useState('ban');
   const [protAction, selectProtAction] = useState('protect');
@@ -173,6 +164,20 @@ function Admintools({
   const [modlist, setModList] = useState([]);
   const [submitting, setSubmitting] = useState(false);
 
+  const [
+    canvasId,
+    canvases,
+    userlvl,
+  ] = useSelector((state) => [
+    state.canvas.canvasId,
+    state.canvas.canvases,
+    state.user.userlvl,
+  ], shallowEqual);
+
+  useEffect(() => {
+    selectCanvas(canvasId);
+  }, [canvasId]);
+
   let descAction;
   switch (imageAction) {
     case 'build':
@@ -597,10 +602,4 @@ function Admintools({
   );
 }
 
-function mapStateToProps(state: State) {
-  const { canvasId, canvases } = state.canvas;
-  const { userlvl } = state.user;
-  return { canvasId, canvases, userlvl };
-}
-
-export default connect(mapStateToProps)(Admintools);
+export default React.memo(Admintools);
diff --git a/src/components/Converter.jsx b/src/components/Converter.jsx
index b0607d5..b886df5 100644
--- a/src/components/Converter.jsx
+++ b/src/components/Converter.jsx
@@ -4,12 +4,11 @@
  */
 
 import React, { useState, useEffect } from 'react';
-import { connect } from 'react-redux';
+import { useSelector, shallowEqual } from 'react-redux';
 import fileDownload from 'js-file-download';
 import { utils, applyPalette } from 'image-q';
 import { jt, t } from 'ttag';
 
-import type { State } from '../reducers';
 import printGIMPPalette from '../core/exportGPL';
 import { copyCanvasToClipboard } from '../utils/clipboard';
 
@@ -208,12 +207,8 @@ async function renderOutputImage(opts) {
 }
 
 
-function Converter({
-  canvasId,
-  canvases,
-  showHiddenCanvases,
-}) {
-  const [selectedCanvas, selectCanvas] = useState(canvasId);
+function Converter() {
+  const [selectedCanvas, selectCanvas] = useState(0);
   const [selectedFile, selectFile] = useState(null);
   const [selectedStrategy, selectStrategy] = useState('nearest');
   const [selectedColorDist, selectColorDist] = useState('euclidean');
@@ -230,6 +225,21 @@ function Converter({
     offsetX: 0,
     offsetY: 0,
   });
+
+  const [
+    canvasId,
+    canvases,
+    showHiddenCanvases,
+  ] = useSelector((state) => [
+    state.canvas.canvasId,
+    state.canvas.canvases,
+    state.canvas.showHiddenCanvases,
+  ], shallowEqual);
+
+  useEffect(() => {
+    selectCanvas(canvasId);
+  }, []);
+
   const input = document.createElement('canvas');
 
   useEffect(() => {
@@ -615,13 +625,4 @@ function Converter({
   );
 }
 
-function mapStateToProps(state: State) {
-  const {
-    canvasId,
-    canvases,
-    showHiddenCanvases,
-  } = state.canvas;
-  return { canvasId, canvases, showHiddenCanvases };
-}
-
-export default connect(mapStateToProps)(Converter);
+export default React.memo(Converter);
diff --git a/src/components/CoolDownBox.jsx b/src/components/CoolDownBox.jsx
index 9e8dfd2..e14c1e0 100644
--- a/src/components/CoolDownBox.jsx
+++ b/src/components/CoolDownBox.jsx
@@ -4,26 +4,24 @@
  */
 
 import React from 'react';
-import { connect } from 'react-redux';
+import { useSelector } from 'react-redux';
 
 import {
   durationToString,
 } from '../core/utils';
-import type { State } from '../reducers';
 
 
-const CoolDownBox = ({ coolDown }) => (
-  <div
-    className={(coolDown && coolDown >= 300)
-      ? 'cooldownbox show' : 'cooldownbox'}
-  >
-    {coolDown && durationToString(coolDown, true)}
-  </div>
-);
+const CoolDownBox = () => {
+  const coolDown = useSelector((state) => state.user.coolDown);
 
-function mapStateToProps(state: State) {
-  const { coolDown } = state.user;
-  return { coolDown };
-}
+  return (
+    <div
+      className={(coolDown && coolDown >= 300)
+        ? 'cooldownbox show' : 'cooldownbox'}
+    >
+      {coolDown && durationToString(coolDown, true)}
+    </div>
+  );
+};
 
-export default connect(mapStateToProps)(CoolDownBox);
+export default React.memo(CoolDownBox);
diff --git a/src/components/CoordinatesBox.jsx b/src/components/CoordinatesBox.jsx
index 88f3e32..bf47b97 100644
--- a/src/components/CoordinatesBox.jsx
+++ b/src/components/CoordinatesBox.jsx
@@ -4,45 +4,38 @@
  */
 
 import React from 'react';
-import { connect } from 'react-redux';
+import { useSelector, useDispatch } from 'react-redux';
 import { t } from 'ttag';
 
 import copy from '../utils/clipboard';
 import { notify } from '../actions';
 
-import type { State } from '../reducers';
-
 
 function renderCoordinates(cell): string {
   return `(${cell.join(', ')})`;
 }
 
 
-const CoordinatesBox = ({ view, hover, notifyCopy }) => (
-  <div
-    className="coorbox"
-    onClick={() => { copy(window.location.hash); notifyCopy(); }}
-    role="button"
-    title={t`Copy to Clipboard`}
-    tabIndex="0"
-  >{
-    renderCoordinates(hover
-    || view.map(Math.round))
-  }</div>
-);
+const CoordinatesBox = () => {
+  const view = useSelector((state) => state.canvas.view);
+  const hover = useSelector((state) => state.gui.hover);
+  const dispatch = useDispatch();
 
-function mapDispatchToProps(dispatch) {
-  return {
-    notifyCopy() {
-      dispatch(notify(t`Copied!`));
-    },
-  };
-}
+  return (
+    <div
+      className="coorbox"
+      onClick={() => {
+        copy(window.location.hash);
+        dispatch(notify(t`Copied!`));
+      }}
+      role="button"
+      title={t`Copy to Clipboard`}
+      tabIndex="0"
+    >{
+      renderCoordinates(hover
+      || view.map(Math.round))
+    }</div>
+  );
+};
 
-function mapStateToProps(state: State) {
-  const { view } = state.canvas;
-  const { hover } = state.gui;
-  return { view, hover };
-}
-
-export default connect(mapStateToProps, mapDispatchToProps)(CoordinatesBox);
+export default React.memo(CoordinatesBox);
diff --git a/src/components/HistorySelect.jsx b/src/components/HistorySelect.jsx
index be3826c..21962d3 100644
--- a/src/components/HistorySelect.jsx
+++ b/src/components/HistorySelect.jsx
@@ -8,7 +8,7 @@ import React, {
 import { useSelector, shallowEqual, useDispatch } from 'react-redux';
 import { t } from 'ttag';
 
-import { dateToString } from '../core/utils';
+import { dateToString, getToday } from '../core/utils';
 import { selectHistoricalTime } from '../actions';
 import { requestHistoricalTimes } from '../actions/fetch';
 
@@ -25,15 +25,6 @@ function stringToTime(timeString) {
   return `${timeString.substr(0, 2)}:${timeString.substr(2, 2)}`;
 }
 
-function getToday() {
-  const date = new Date();
-  let day = date.getDate();
-  let month = date.getMonth() + 1;
-  if (month < 10) month = `0${month}`;
-  if (day < 10) day = `0${day}`;
-  return `${date.getFullYear()}-${month}-${day}`;
-}
-
 const HistorySelect = () => {
   const dateSelect = useRef(null);
 
diff --git a/src/components/OnlineBox.jsx b/src/components/OnlineBox.jsx
index 182ca51..d861cc3 100644
--- a/src/components/OnlineBox.jsx
+++ b/src/components/OnlineBox.jsx
@@ -4,37 +4,40 @@
  */
 
 import React from 'react';
-import { connect } from 'react-redux';
+import { useSelector, shallowEqual } from 'react-redux';
 import { FaUser, FaPaintBrush } from 'react-icons/fa';
 import { t } from 'ttag';
 import { numberToString } from '../core/utils';
 
 
-import type { State } from '../reducers';
+const OnlineBox = () => {
+  const [
+    online,
+    totalPixels,
+    name,
+  ] = useSelector((state) => [
+    state.ranks.online,
+    state.ranks.totalPixels,
+    state.user.name,
+  ], shallowEqual);
 
+  return (
+    <div>
+      {(online || name)
+        ? (
+          <div className="onlinebox">
+            {(online)
+              && <span title={t`User online`}>{online} <FaUser />&nbsp;</span>}
+            {(name != null)
+                && (
+                <span title={t`Pixels placed`}>
+                  {numberToString(totalPixels)} <FaPaintBrush />
+                </span>
+                )}
+          </div>
+        ) : null}
+    </div>
+  );
+};
 
-const OnlineBox = ({ online, totalPixels, name }) => (
-  <div>
-    {(online || name)
-      ? (
-        <div className="onlinebox">
-          {(online)
-            && <span title={t`User online`}>{online} <FaUser />&nbsp;</span>}
-          {(name != null)
-              && (
-              <span title={t`Pixels placed`}>
-                {numberToString(totalPixels)} <FaPaintBrush />
-              </span>
-              )}
-        </div>
-      ) : null}
-  </div>
-);
-
-function mapStateToProps(state: State) {
-  const { online, totalPixels } = state.ranks;
-  const { name } = state.user;
-  return { online, totalPixels, name };
-}
-
-export default connect(mapStateToProps)(OnlineBox);
+export default React.memo(OnlineBox);
diff --git a/src/components/Palette.jsx b/src/components/Palette.jsx
index 1e9f2e0..b71abab 100644
--- a/src/components/Palette.jsx
+++ b/src/components/Palette.jsx
@@ -4,10 +4,9 @@
  */
 
 import React, { useState, useEffect } from 'react';
-import { connect } from 'react-redux';
+import { useDispatch, useSelector, shallowEqual } from 'react-redux';
 
 import { selectColor } from '../actions';
-import type { State } from '../reducers';
 import useWindowSize from './hooks/resize';
 
 
@@ -90,15 +89,22 @@ function getStylesByWindowSize(
   }];
 }
 
-function Palette({
-  colors,
-  selectedColor,
-  paletteOpen,
-  compactPalette,
-  select,
-  clrIgnore,
-}) {
+const Palette = () => {
   const [render, setRender] = useState(false);
+  const [
+    paletteOpen,
+    compactPalette,
+    colors,
+    clrIgnore,
+    selectedColor,
+  ] = useSelector((state) => [
+    state.gui.paletteOpen,
+    state.gui.compactPalette,
+    state.canvas.palette.colors,
+    state.canvas.clrIgnore,
+    state.canvas.selectedColor,
+  ], shallowEqual);
+  const dispatch = useDispatch();
 
   useEffect(() => {
     window.setTimeout(() => {
@@ -139,32 +145,12 @@ function Palette({
               ? 'selected'
               : 'unselected'}
             color={color}
-            onClick={() => select(index + clrIgnore)}
+            onClick={() => dispatch(selectColor(index + clrIgnore))}
           />
         ))}
       </div>
     )
   );
-}
+};
 
-function mapStateToProps(state: State) {
-  const { paletteOpen, compactPalette } = state.gui;
-  const { palette, clrIgnore, selectedColor } = state.canvas;
-  return {
-    colors: palette.colors,
-    selectedColor,
-    paletteOpen,
-    compactPalette,
-    clrIgnore,
-  };
-}
-
-function mapDispatchToProps(dispatch) {
-  return {
-    select(color) {
-      dispatch(selectColor(color));
-    },
-  };
-}
-
-export default connect(mapStateToProps, mapDispatchToProps)(Palette);
+export default React.memo(Palette);
diff --git a/src/components/Style.jsx b/src/components/Style.jsx
index 893ccab..144520e 100644
--- a/src/components/Style.jsx
+++ b/src/components/Style.jsx
@@ -4,21 +4,13 @@
  */
 
 import React from 'react';
-import { connect } from 'react-redux';
+import { useSelector } from 'react-redux';
 
-import type { State } from '../reducers';
-
-function Style({ style }) {
+function Style() {
+  const style = useSelector((state) => state.gui.style);
   const cssUri = window.ssv.availableStyles[style];
   return (style === 'default') ? null
     : (<link rel="stylesheet" type="text/css" href={cssUri} />);
 }
 
-function mapStateToProps(state: State) {
-  const {
-    style,
-  } = state.gui;
-  return { style };
-}
-
-export default connect(mapStateToProps)(Style);
+export default React.memo(Style);
diff --git a/src/components/UI.jsx b/src/components/UI.jsx
index 1fedeee..37cbebc 100644
--- a/src/components/UI.jsx
+++ b/src/components/UI.jsx
@@ -4,9 +4,8 @@
  */
 
 import React from 'react';
-import { connect } from 'react-redux';
+import { useSelector, shallowEqual } from 'react-redux';
 
-import type { State } from '../reducers';
 import CoolDownBox from './CoolDownBox';
 import NotifyBox from './NotifyBox';
 import GlobeButton from './buttons/GlobeButton';
@@ -25,13 +24,21 @@ const CONTEXT_MENUS = {
   /* other context menus */
 };
 
-const UI = ({
-  isHistoricalView,
-  is3D,
-  isOnMobile,
-  menuOpen,
-  menuType,
-}) => {
+const UI = () => {
+  const [
+    isHistoricalView,
+    is3D,
+    isOnMobile,
+    menuOpen,
+    menuType,
+  ] = useSelector((state) => [
+    state.canvas.isHistoricalView,
+    state.canvas.is3D,
+    state.user.isOnMobile,
+    state.contextMenu.menuOpen,
+    state.contextMenu.menuType,
+  ], shallowEqual);
+
   const contextMenu = (menuOpen && menuType) ? CONTEXT_MENUS[menuType] : null;
 
   if (isHistoricalView) {
@@ -52,25 +59,4 @@ const UI = ({
   ];
 };
 
-function mapStateToProps(state: State) {
-  const {
-    isHistoricalView,
-    is3D,
-  } = state.canvas;
-  const {
-    isOnMobile,
-  } = state.user;
-  const {
-    menuOpen,
-    menuType,
-  } = state.contextMenu;
-  return {
-    isHistoricalView,
-    is3D,
-    isOnMobile,
-    menuOpen,
-    menuType,
-  };
-}
-
-export default connect(mapStateToProps)(UI);
+export default React.memo(UI);
diff --git a/src/components/windows/Settings.jsx b/src/components/windows/Settings.jsx
index e3f43db..fb7d42f 100644
--- a/src/components/windows/Settings.jsx
+++ b/src/components/windows/Settings.jsx
@@ -4,7 +4,7 @@
  */
 
 import React from 'react';
-import { connect } from 'react-redux';
+import { useSelector, useDispatch, shallowEqual } from 'react-redux';
 import { c, t } from 'ttag';
 
 import LanguageSelect from '../LanguageSelect';
@@ -22,8 +22,6 @@ import {
   selectStyle,
 } from '../../actions';
 
-import type { State } from '../../reducers';
-
 
 const flexy = {
   display: 'flex',
@@ -97,28 +95,32 @@ const SettingsItem = ({
   </div>
 );
 
-function Settings({
-  isMuted,
-  isGridShown,
-  isPixelNotifyShown,
-  isPotato,
-  isLightGrid,
-  isHistoricalView,
-  onMute,
-  autoZoomIn,
-  compactPalette,
-  selectedStyle,
-  onToggleGrid,
-  onTogglePixelNotify,
-  onToggleAutoZoomIn,
-  onToggleCompactPalette,
-  onToggleChatNotify,
-  onTogglePotatoMode,
-  onToggleLightGrid,
-  onToggleHistoricalView,
-  onSelectStyle,
-  chatNotify,
-}) {
+function Settings() {
+  const [
+    isGridShown,
+    isPixelNotifyShown,
+    autoZoomIn,
+    compactPalette,
+    isPotato,
+    isLightGrid,
+    selectedStyle,
+    isMuted,
+    chatNotify,
+    isHistoricalView,
+  ] = useSelector((state) => [
+    state.gui.showGrid,
+    state.gui.showPixelNotify,
+    state.gui.autoZoomIn,
+    state.gui.compactPalette,
+    state.gui.isPotato,
+    state.gui.isLightGrid,
+    state.gui.style,
+    state.audio.mute,
+    state.audio.chatNotify,
+    state.canvas.isHistoricalView,
+  ], shallowEqual);
+  const dispatch = useDispatch();
+
   return (
     <div style={{ paddingLeft: '5%', paddingRight: '5%', paddingTop: 30 }}>
       <SettingsItem
@@ -126,14 +128,14 @@ function Settings({
         description={t`Turn on grid to highlight pixel borders.`}
         keyBind={c('keybinds').t`G`}
         value={isGridShown}
-        onToggle={onToggleGrid}
+        onToggle={() => dispatch(toggleGrid())}
       />
       <SettingsItem
         title={t`Show Pixel Activity`}
         description={t`Show circles where pixels are placed.`}
         keyBind={c('keybinds').t`X`}
         value={isPixelNotifyShown}
-        onToggle={onTogglePixelNotify}
+        onToggle={() => dispatch(togglePixelNotify())}
       />
       <SettingsItem
         title={t`Disable Game Sounds`}
@@ -141,39 +143,39 @@ function Settings({
         description={t`All sound effects will be disabled.`}
         keyBind={c('keybinds').t`M`}
         value={isMuted}
-        onToggle={onMute}
+        onToggle={() => dispatch(toggleMute())}
       />
       <SettingsItem
         title={t`Enable chat notifications`}
         description={t`Play a sound when new chat messages arrive`}
         value={chatNotify}
-        onToggle={onToggleChatNotify}
+        onToggle={() => dispatch(toggleChatNotify())}
       />
       <SettingsItem
         title={t`Auto Zoom In`}
         // eslint-disable-next-line max-len
         description={t`Zoom in instead of placing a pixel when you tap the canvas and your zoom is small.`}
         value={autoZoomIn}
-        onToggle={onToggleAutoZoomIn}
+        onToggle={() => dispatch(toggleAutoZoomIn())}
       />
       <SettingsItem
         title={t`Compact Palette`}
         // eslint-disable-next-line max-len
         description={t`Display Palette in a compact form that takes less screen space.`}
         value={compactPalette}
-        onToggle={onToggleCompactPalette}
+        onToggle={() => dispatch(toggleCompactPalette())}
       />
       <SettingsItem
         title={t`Potato Mode`}
         description={t`For when you are playing on a potato.`}
         value={isPotato}
-        onToggle={onTogglePotatoMode}
+        onToggle={() => dispatch(togglePotatoMode())}
       />
       <SettingsItem
         title={t`Light Grid`}
         description={t`Show Grid in white instead of black.`}
         value={isLightGrid}
-        onToggle={onToggleLightGrid}
+        onToggle={() => dispatch(toggleLightGrid())}
       />
       {(window.ssv && window.ssv.backupurl) && (
       <SettingsItem
@@ -181,7 +183,7 @@ function Settings({
         description={t`Check out past versions of the canvas.`}
         value={isHistoricalView}
         keyBind={c('keybinds').t`H`}
-        onToggle={onToggleHistoricalView}
+        onToggle={() => dispatch(toggleHistoricalView())}
       />
       )}
       {(window.ssv && window.ssv.availableStyles) && (
@@ -190,7 +192,7 @@ function Settings({
           description={t`How pixelplanet should look like.`}
           values={Object.keys(window.ssv.availableStyles)}
           selected={selectedStyle}
-          onSelect={onSelectStyle}
+          onSelect={(style) => dispatch(selectStyle(style))}
         />
       )}
       {(window.ssv && navigator.cookieEnabled && window.ssv.langs) && (
@@ -207,70 +209,4 @@ function Settings({
   );
 }
 
-function mapStateToProps(state: State) {
-  const { mute, chatNotify } = state.audio;
-  const {
-    showGrid,
-    showPixelNotify,
-    autoZoomIn,
-    compactPalette,
-    isPotato,
-    isLightGrid,
-    style: selectedStyle,
-  } = state.gui;
-  const isMuted = mute;
-  const {
-    isHistoricalView,
-  } = state.canvas;
-  const isGridShown = showGrid;
-  const isPixelNotifyShown = showPixelNotify;
-  return {
-    isMuted,
-    isGridShown,
-    isPixelNotifyShown,
-    autoZoomIn,
-    compactPalette,
-    chatNotify,
-    isPotato,
-    isLightGrid,
-    isHistoricalView,
-    selectedStyle,
-  };
-}
-
-function mapDispatchToProps(dispatch) {
-  return {
-    onMute() {
-      dispatch(toggleMute());
-    },
-    onToggleGrid() {
-      dispatch(toggleGrid());
-    },
-    onTogglePixelNotify() {
-      dispatch(togglePixelNotify());
-    },
-    onToggleAutoZoomIn() {
-      dispatch(toggleAutoZoomIn());
-    },
-    onToggleCompactPalette() {
-      dispatch(toggleCompactPalette());
-    },
-    onToggleChatNotify() {
-      dispatch(toggleChatNotify());
-    },
-    onTogglePotatoMode() {
-      dispatch(togglePotatoMode());
-    },
-    onToggleLightGrid() {
-      dispatch(toggleLightGrid());
-    },
-    onToggleHistoricalView() {
-      dispatch(toggleHistoricalView());
-    },
-    onSelectStyle(style) {
-      dispatch(selectStyle(style));
-    },
-  };
-}
-
-export default connect(mapStateToProps, mapDispatchToProps)(Settings);
+export default React.memo(Settings);
diff --git a/src/core/utils.js b/src/core/utils.js
index 44322bc..f762a6a 100644
--- a/src/core/utils.js
+++ b/src/core/utils.js
@@ -46,6 +46,18 @@ export function dateToString(date: string) {
   return date.substr(0, 4) + date.substr(5, 2) + date.substr(8, 2);
 }
 
+/*
+ * get current date in YYYY-MM-DD
+ */
+export function getToday() {
+  const date = new Date();
+  let day = date.getDate();
+  let month = date.getMonth() + 1;
+  if (month < 10) month = `0${month}`;
+  if (day < 10) day = `0${day}`;
+  return `${date.getFullYear()}-${month}-${day}`;
+}
+
 // z is assumed to be height here
 // in ui and rendeer, y is height
 export function getChunkOfPixel(