diff --git a/package.json b/package.json
index 6f14588c..279af451 100644
--- a/package.json
+++ b/package.json
@@ -143,7 +143,7 @@
         "react-virtuoso": "^1.10.4",
         "redux": "^4.1.0",
         "revolt-api": "0.5.3-alpha.10",
-        "revolt.js": "5.1.0-alpha.15",
+        "revolt.js": "5.2.0-patch.0",
         "rimraf": "^3.0.2",
         "sass": "^1.35.1",
         "shade-blend-color": "^1.0.0",
diff --git a/src/components/navigation/left/HomeSidebar.tsx b/src/components/navigation/left/HomeSidebar.tsx
index 837638ad..d378fd75 100644
--- a/src/components/navigation/left/HomeSidebar.tsx
+++ b/src/components/navigation/left/HomeSidebar.tsx
@@ -5,7 +5,7 @@ import {
     Notepad,
 } from "@styled-icons/boxicons-solid";
 import { observer } from "mobx-react-lite";
-import { Link, Redirect, useLocation, useParams } from "react-router-dom";
+import { Link, useLocation, useParams } from "react-router-dom";
 import { RelationshipStatus } from "revolt-api/types/Users";
 
 import { Text } from "preact-i18n";
@@ -16,48 +16,37 @@ import PaintCounter from "../../../lib/PaintCounter";
 import { isTouchscreenDevice } from "../../../lib/isTouchscreenDevice";
 
 import { useApplicationState } from "../../../mobx/State";
-import { dispatch } from "../../../redux";
-import { connectState } from "../../../redux/connector";
-import { Unreads } from "../../../redux/reducers/unreads";
 
 import { useIntermediate } from "../../../context/intermediate/Intermediate";
 import { AppContext } from "../../../context/revoltjs/RevoltClient";
 
 import Category from "../../ui/Category";
 import placeholderSVG from "../items/placeholder.svg";
-import { mapChannelWithUnread, useUnreads } from "./common";
 
 import { GenericSidebarBase, GenericSidebarList } from "../SidebarBase";
 import ButtonItem, { ChannelButton } from "../items/ButtonItem";
 import ConnectionStatus from "../items/ConnectionStatus";
 
-type Props = {
-    unreads: Unreads;
-};
-
-const HomeSidebar = observer((props: Props) => {
+export default observer(() => {
     const { pathname } = useLocation();
     const client = useContext(AppContext);
-    const layout = useApplicationState().layout;
-    const { channel } = useParams<{ channel: string }>();
+    const state = useApplicationState();
+    const { channel: currentChannel } = useParams<{ channel: string }>();
     const { openScreen } = useIntermediate();
 
-    const channels = [...client.channels.values()]
-        .filter(
-            (x) =>
-                x.channel_type === "DirectMessage" ||
-                x.channel_type === "Group",
-        )
-        .map((x) => mapChannelWithUnread(x, props.unreads));
+    const channels = [...client.channels.values()].filter(
+        (x) => x.channel_type === "DirectMessage" || x.channel_type === "Group",
+    );
 
-    const obj = client.channels.get(channel);
-    if (channel && !obj) return <Redirect to="/" />;
-    if (obj) useUnreads({ ...props, channel: obj });
+    const obj = client.channels.get(currentChannel);
 
+    // ! FIXME: move this globally
     // Track what page the user was last on (in home page).
-    useEffect(() => layout.setLastHomePath(pathname), [pathname]);
+    useEffect(() => state.layout.setLastHomePath(pathname), [pathname]);
 
-    channels.sort((b, a) => a.timestamp.localeCompare(b.timestamp));
+    channels.sort((b, a) =>
+        a.last_message_id_or_past.localeCompare(b.last_message_id_or_past),
+    );
 
     return (
         <GenericSidebarBase mobilePadding>
@@ -127,31 +116,37 @@ const HomeSidebar = observer((props: Props) => {
                 {channels.length === 0 && (
                     <img src={placeholderSVG} loading="eager" />
                 )}
-                {channels.map((x) => {
+                {channels.map((channel) => {
                     let user;
-                    if (x.channel.channel_type === "DirectMessage") {
-                        if (!x.channel.active) return null;
-                        user = x.channel.recipient;
+                    if (channel.channel_type === "DirectMessage") {
+                        if (!channel.active) return null;
+                        user = channel.recipient;
 
-                        if (!user) {
-                            console.warn(
-                                `Skipped DM ${x.channel._id} because user was missing.`,
-                            );
-                            return null;
-                        }
+                        if (!user) return null;
                     }
 
+                    const isUnread = channel.isUnread(state.notifications);
+                    const mentionCount = channel.getMentions(
+                        state.notifications,
+                    ).length;
+
                     return (
                         <ConditionalLink
-                            key={x.channel._id}
-                            active={x.channel._id === channel}
-                            to={`/channel/${x.channel._id}`}>
+                            key={channel._id}
+                            active={channel._id === currentChannel}
+                            to={`/channel/${channel._id}`}>
                             <ChannelButton
                                 user={user}
-                                channel={x.channel}
-                                alert={x.unread}
-                                alertCount={x.alertCount}
-                                active={x.channel._id === channel}
+                                channel={channel}
+                                alert={
+                                    mentionCount > 0
+                                        ? "mention"
+                                        : isUnread
+                                        ? "unread"
+                                        : undefined
+                                }
+                                alertCount={mentionCount}
+                                active={channel._id === currentChannel}
                             />
                         </ConditionalLink>
                     );
@@ -161,13 +156,3 @@ const HomeSidebar = observer((props: Props) => {
         </GenericSidebarBase>
     );
 });
-
-export default connectState(
-    HomeSidebar,
-    (state) => {
-        return {
-            unreads: state.unreads,
-        };
-    },
-    true,
-);
diff --git a/src/components/navigation/left/ServerListSidebar.tsx b/src/components/navigation/left/ServerListSidebar.tsx
index 3a27f84b..ddb0948f 100644
--- a/src/components/navigation/left/ServerListSidebar.tsx
+++ b/src/components/navigation/left/ServerListSidebar.tsx
@@ -13,8 +13,6 @@ import PaintCounter from "../../../lib/PaintCounter";
 import { isTouchscreenDevice } from "../../../lib/isTouchscreenDevice";
 
 import { useApplicationState } from "../../../mobx/State";
-import { connectState } from "../../../redux/connector";
-import { Unreads } from "../../../redux/reducers/unreads";
 
 import { useIntermediate } from "../../../context/intermediate/Intermediate";
 import { useClient } from "../../../context/revoltjs/RevoltClient";
@@ -25,7 +23,6 @@ import UserHover from "../../common/user/UserHover";
 import UserIcon from "../../common/user/UserIcon";
 import IconButton from "../../ui/IconButton";
 import LineDivider from "../../ui/LineDivider";
-import { mapChannelWithUnread } from "./common";
 
 import { Children } from "../../../types/Preact";
 
@@ -193,47 +190,14 @@ function Swoosh() {
     );
 }
 
-interface Props {
-    unreads: Unreads;
-}
-
-export const ServerListSidebar = observer(({ unreads }: Props) => {
+export default observer(() => {
     const client = useClient();
     const state = useApplicationState();
 
     const { server: server_id } = useParams<{ server?: string }>();
     const server = server_id ? client.servers.get(server_id) : undefined;
-    const activeServers = [...client.servers.values()];
-    const channels = [...client.channels.values()].map((x) =>
-        mapChannelWithUnread(x, unreads),
-    );
-
-    const unreadChannels = channels
-        .filter((x) => x.unread)
-        .filter((x) => !state.notifications.isMuted(x.channel))
-        .map((x) => x.channel?._id);
-
-    const servers = activeServers.map((server) => {
-        let alertCount = 0;
-        for (const id of server.channel_ids) {
-            const channel = channels.find((x) => x.channel?._id === id);
-            if (channel?.alertCount) {
-                alertCount += channel.alertCount;
-            }
-        }
-
-        return {
-            server,
-            unread: (typeof server.channel_ids.find((x) =>
-                unreadChannels.includes(x),
-            ) !== "undefined"
-                ? alertCount > 0
-                    ? "mention"
-                    : "unread"
-                : undefined) as "mention" | "unread" | undefined,
-            alertCount,
-        };
-    });
+    const servers = [...client.servers.values()];
+    const channels = [...client.channels.values()];
 
     const history = useHistory();
     const path = useLocation().pathname;
@@ -241,16 +205,16 @@ export const ServerListSidebar = observer(({ unreads }: Props) => {
 
     let homeUnread: "mention" | "unread" | undefined;
     let alertCount = 0;
-    for (const x of channels) {
-        if (x.channel?.channel_type === "Group" && x.unread) {
+    for (const channel of channels) {
+        if (channel?.channel_type === "Group" && channel.unread) {
             homeUnread = "unread";
-            alertCount += x.alertCount ?? 0;
+            alertCount += channel.mentions.length;
         }
 
         if (
-            x.channel?.channel_type === "DirectMessage" &&
-            x.channel.active &&
-            x.unread
+            channel.channel_type === "DirectMessage" &&
+            channel.active &&
+            channel.unread
         ) {
             alertCount++;
         }
@@ -294,32 +258,40 @@ export const ServerListSidebar = observer(({ unreads }: Props) => {
                     </ServerEntry>
                 </ConditionalLink>
                 <LineDivider />
-                {servers.map((entry) => {
-                    const active = entry.server._id === server?._id;
+                {servers.map((server) => {
+                    const active = server._id === server_id;
+
+                    const isUnread = server.isUnread(state.notifications);
+                    const mentionCount = server.getMentions(
+                        state.notifications,
+                    ).length;
 
                     return (
                         <ConditionalLink
-                            key={entry.server._id}
+                            key={server._id}
                             active={active}
-                            to={state.layout.getServerPath(entry.server._id)}>
+                            to={state.layout.getServerPath(server._id)}>
                             <ServerEntry
                                 active={active}
                                 onContextMenu={attachContextMenu("Menu", {
-                                    server: entry.server._id,
-                                    unread: entry.unread,
+                                    server: server._id,
+                                    unread: isUnread,
                                 })}>
                                 <Swoosh />
                                 <Tooltip
-                                    content={entry.server.name}
+                                    content={server.name}
                                     placement="right">
                                     <Icon
                                         size={42}
-                                        unread={entry.unread}
-                                        count={entry.alertCount}>
-                                        <ServerIcon
-                                            size={32}
-                                            target={entry.server}
-                                        />
+                                        unread={
+                                            mentionCount > 0
+                                                ? "mention"
+                                                : isUnread
+                                                ? "unread"
+                                                : undefined
+                                        }
+                                        count={mentionCount}>
+                                        <ServerIcon size={32} target={server} />
                                     </Icon>
                                 </Tooltip>
                             </ServerEntry>
@@ -353,9 +325,3 @@ export const ServerListSidebar = observer(({ unreads }: Props) => {
         </ServersBase>
     );
 });
-
-export default connectState(ServerListSidebar, (state) => {
-    return {
-        unreads: state.unreads,
-    };
-});
diff --git a/src/components/navigation/left/ServerSidebar.tsx b/src/components/navigation/left/ServerSidebar.tsx
index 33e3f4b7..7ed142ef 100644
--- a/src/components/navigation/left/ServerSidebar.tsx
+++ b/src/components/navigation/left/ServerSidebar.tsx
@@ -11,25 +11,17 @@ import { internalEmit } from "../../../lib/eventEmitter";
 import { isTouchscreenDevice } from "../../../lib/isTouchscreenDevice";
 
 import { useApplicationState } from "../../../mobx/State";
-import { dispatch } from "../../../redux";
 import { connectState } from "../../../redux/connector";
-import { Notifications } from "../../../redux/reducers/notifications";
-import { Unreads } from "../../../redux/reducers/unreads";
 
 import { useClient } from "../../../context/revoltjs/RevoltClient";
 
 import CollapsibleSection from "../../common/CollapsibleSection";
 import ServerHeader from "../../common/ServerHeader";
 import Category from "../../ui/Category";
-import { mapChannelWithUnread, useUnreads } from "./common";
 
 import { ChannelButton } from "../items/ButtonItem";
 import ConnectionStatus from "../items/ConnectionStatus";
 
-interface Props {
-    unreads: Unreads;
-}
-
 const ServerBase = styled.div`
     height: 100%;
     width: 240px;
@@ -56,7 +48,7 @@ const ServerList = styled.div`
     }
 `;
 
-const ServerSidebar = observer((props: Props) => {
+export default observer(() => {
     const client = useClient();
     const state = useApplicationState();
     const { server: server_id, channel: channel_id } =
@@ -76,9 +68,7 @@ const ServerSidebar = observer((props: Props) => {
         );
     if (channel_id && !channel) return <Redirect to={`/server/${server_id}`} />;
 
-    // Handle unreads; FIXME: should definitely not be here
-    if (channel) useUnreads({ ...props, channel });
-
+    // ! FIXME: move this globally
     // Track which channel the user was last on.
     useEffect(() => {
         if (!channel_id) return;
@@ -95,6 +85,8 @@ const ServerSidebar = observer((props: Props) => {
         if (!entry) return;
 
         const active = channel?._id === entry._id;
+        const isUnread = entry.isUnread(state.notifications);
+        const mentionCount = entry.getMentions(state.notifications);
 
         return (
             <ConditionalLink
@@ -115,8 +107,13 @@ const ServerSidebar = observer((props: Props) => {
                 <ChannelButton
                     channel={entry}
                     active={active}
-                    // ! FIXME: pull it out directly
-                    alert={mapChannelWithUnread(entry, props.unreads).unread}
+                    alert={
+                        mentionCount.length > 0
+                            ? "mention"
+                            : isUnread
+                            ? "unread"
+                            : undefined
+                    }
                     compact
                     muted={state.notifications.isMuted(entry)}
                 />
@@ -161,10 +158,3 @@ const ServerSidebar = observer((props: Props) => {
         </ServerBase>
     );
 });
-
-export default connectState(ServerSidebar, (state) => {
-    return {
-        unreads: state.unreads,
-        notifications: state.notifications,
-    };
-});
diff --git a/src/components/navigation/left/common.ts b/src/components/navigation/left/common.ts
index 774934f4..ee5e5b66 100644
--- a/src/components/navigation/left/common.ts
+++ b/src/components/navigation/left/common.ts
@@ -1,7 +1,7 @@
 import { reaction } from "mobx";
 import { Channel } from "revolt.js/dist/maps/Channels";
 
-import { useLayoutEffect, useRef } from "preact/hooks";
+import { useLayoutEffect } from "preact/hooks";
 
 import { dispatch } from "../../../redux";
 import { Unreads } from "../../../redux/reducers/unreads";
diff --git a/src/mobx/stores/NotificationOptions.ts b/src/mobx/stores/NotificationOptions.ts
index 9bb3b23e..51c45511 100644
--- a/src/mobx/stores/NotificationOptions.ts
+++ b/src/mobx/stores/NotificationOptions.ts
@@ -195,12 +195,17 @@ export default class NotificationOptions implements Store, Persistent<Data> {
      * @returns Whether this object is muted
      */
     isMuted(target?: Channel | Server) {
+        var value: NotificationState | undefined;
         if (target instanceof Channel) {
-            return this.computeForChannel(target) === "muted";
+            value = this.computeForChannel(target);
         } else if (target instanceof Server) {
-            return this.computeForServer(target._id) === "muted";
-        } else {
-            return false;
+            value = this.computeForServer(target._id);
         }
+
+        if (value === "muted") {
+            return true;
+        }
+
+        return false;
     }
 }
diff --git a/src/mobx/stores/ServerConfig.ts b/src/mobx/stores/ServerConfig.ts
index 6e4b5d9d..6b44bec1 100644
--- a/src/mobx/stores/ServerConfig.ts
+++ b/src/mobx/stores/ServerConfig.ts
@@ -41,6 +41,7 @@ export default class ServerConfig
      */
     createClient() {
         const client = new Client({
+            unreads: true,
             autoReconnect: false,
             apiURL: import.meta.env.VITE_API_URL,
             debug: import.meta.env.DEV,
diff --git a/src/pages/channels/Channel.tsx b/src/pages/channels/Channel.tsx
index 9f4767f0..cf162c6d 100644
--- a/src/pages/channels/Channel.tsx
+++ b/src/pages/channels/Channel.tsx
@@ -1,5 +1,6 @@
 import { Hash } from "@styled-icons/boxicons-regular";
 import { Ghost } from "@styled-icons/boxicons-solid";
+import { reaction } from "mobx";
 import { observer } from "mobx-react-lite";
 import { useParams } from "react-router-dom";
 import { Channel as ChannelI } from "revolt.js/dist/maps/Channels";
@@ -10,7 +11,6 @@ import { useEffect, useState } from "preact/hooks";
 
 import { isTouchscreenDevice } from "../../lib/isTouchscreenDevice";
 
-import { useApplicationState } from "../../mobx/State";
 import { dispatch, getState } from "../../redux";
 
 import { useClient } from "../../context/revoltjs/RevoltClient";
@@ -93,6 +93,23 @@ const TextChannel = observer(({ channel }: { channel: ChannelI }) => {
         getState().sectionToggle[CHANNELS_SIDEBAR_KEY] ?? true,
     );
 
+    // Mark channel as read.
+    useEffect(() => {
+        const checkUnread = () =>
+            channel.unread &&
+            channel.client.unreads!.markRead(
+                channel._id,
+                channel.last_message_id!,
+                true,
+            );
+
+        checkUnread();
+        return reaction(
+            () => channel.last_message_id,
+            () => checkUnread(),
+        );
+    }, [channel]);
+
     return (
         <AgeGate
             type="channel"
diff --git a/yarn.lock b/yarn.lock
index a538d37b..44bc6454 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3088,6 +3088,11 @@ lodash.defaultsdeep@^4.6.1:
   resolved "https://registry.yarnpkg.com/lodash.defaultsdeep/-/lodash.defaultsdeep-4.6.1.tgz#512e9bd721d272d94e3d3a63653fa17516741ca6"
   integrity sha512-3j8wdDzYuWO3lM3Reg03MuQR957t287Rpcxp1njpEa8oDrikb+FwGdW3n+FELh/A6qib6yPit0j/pv9G/yeAqA==
 
+lodash.flatten@^4.4.0:
+  version "4.4.0"
+  resolved "https://registry.yarnpkg.com/lodash.flatten/-/lodash.flatten-4.4.0.tgz#f31c22225a9632d2bbf8e4addbef240aa765a61f"
+  integrity sha1-8xwiIlqWMtK7+OSt2+8kCqdlph8=
+
 lodash.isequal@^4.5.0:
   version "4.5.0"
   resolved "https://registry.yarnpkg.com/lodash.isequal/-/lodash.isequal-4.5.0.tgz#415c4478f2bcc30120c22ce10ed3226f7d3e18e0"
@@ -3765,16 +3770,17 @@ revolt-api@^0.5.3-alpha.9:
   resolved "https://registry.yarnpkg.com/revolt-api/-/revolt-api-0.5.3-alpha.9.tgz#46e75b7d8f9c6702df39039b829dddbb7897f237"
   integrity sha512-L8K9uPV3ME8bLdtWm8L9iPQvFM0GghA+5LzmWFjd6Gbn56u22ZYub2lABi4iHrWgeA2X41dGSsuSBgHSlts9Og==
 
-revolt.js@5.1.0-alpha.15:
-  version "5.1.0-alpha.15"
-  resolved "https://registry.yarnpkg.com/revolt.js/-/revolt.js-5.1.0-alpha.15.tgz#a2be1f29de93f1ec18f0e502ecb65ade55c0070d"
-  integrity sha512-1gGcGDv1+J5NlmnX099XafKugCebACg9ke0NA754I4hLTNMMwkZyphyvYWWWkI394qn2mA3NG7WgEmrIoZUtgw==
+revolt.js@5.2.0-patch.0:
+  version "5.2.0-patch.0"
+  resolved "https://registry.yarnpkg.com/revolt.js/-/revolt.js-5.2.0-patch.0.tgz#af6afc402399e5394b50b2e7d1573ff490fd3906"
+  integrity sha512-PnHKqRpEvrBFm1xtLA/lGG5FIsp5kW4eB8sYiejjQCA1DWi7Xg6MNvyOjjha6jKftPXF8roivfZWEnM7sY1bnA==
   dependencies:
     axios "^0.21.4"
     eventemitter3 "^4.0.7"
     exponential-backoff "^3.1.0"
     isomorphic-ws "^4.0.1"
     lodash.defaultsdeep "^4.6.1"
+    lodash.flatten "^4.4.0"
     lodash.isequal "^4.5.0"
     mobx "^6.3.2"
     revolt-api "^0.5.3-alpha.9"