diff --git a/src/i18n/en-GB.yml b/src/i18n/en-GB.yml
index 1f8f977..281c174 100644
--- a/src/i18n/en-GB.yml
+++ b/src/i18n/en-GB.yml
@@ -399,6 +399,11 @@ ticket:
       title: ❓ {requestedBy} wants to close this ticket
     wait_for_staff: ✋ Please wait for staff to close this ticket.
     wait_for_user: ✋ Please wait for the user to respond.
+  closing_soon:
+    description: |
+      This ticket will be closed due to inactivity <t:{timestamp}:R>.
+      Send a message to cancel this automation.
+    title: ⌛ This ticket will be closed soon
   created:
     description: "Your ticket channel has been created: {channel}."
     title: ✅ Ticket created
@@ -406,6 +411,11 @@ ticket:
     description: Your changes have been saved.
     title: ✅ Ticket updated
   feedback: Thank you for your feedback.
+  inactive:
+    description: |
+      There hasn't been any activity in this channel since <t:{timestamp}:R>.
+      Please continue the conversation or {close} the ticket.
+    title: ⏰ This ticket is inactive
   offline:
     description:
       There aren't any staff members available at the moment, so it may
diff --git a/src/listeners/client/ready.js b/src/listeners/client/ready.js
index 53d5402..ec729ef 100644
--- a/src/listeners/client/ready.js
+++ b/src/listeners/client/ready.js
@@ -9,6 +9,13 @@ const { version } = require('../../../package.json');
 const { msToMins } = require('../../lib/misc');
 const sync = require('../../lib/sync');
 const checkForUpdates = require('../../lib/updates');
+const { isStaff } = require('../../lib/users');
+const {
+	ActionRowBuilder,
+	ButtonBuilder,
+	ButtonStyle,
+} = require('discord.js');
+const ExtendedEmbedBuilder = require('../../lib/embed');
 
 module.exports = class extends Listener {
 	constructor(client, options) {
@@ -137,20 +144,101 @@ module.exports = class extends Listener {
 			setInterval(() => checkForUpdates(client), ms('1w'));
 		}
 
-		setInterval(() => {
-			// TODO: check lastMessageAt and set stale
-			// this.$stale.set(ticket.id, {
-			// 	closeAt: ticket.guild.autoClose ? Date.now() + ticket.guild.autoClose : null,
-			// 	closedBy: null, // null if set as stale due to inactivity
-			// 	message: sent,
-			// 	messages: 0,
-			// 	reason: 'inactivity',
-			// 	staleSince: Date.now(),
-			// });
+		// send inactivity warnings and close stale tickets
+		const staleInterval = ms('5m');
+		setInterval(async () => {
+			// close stale tickets
+			for (const [ticketId, $] of client.tickets.$stale) {
+				const autoCloseAfter = $.closeAt - $.staleSince;
+				const halfway = $.closeAt - (autoCloseAfter / 2);
+				if (Date.now() >= halfway && Date.now() < halfway + staleInterval) {
+					const channel = client.channels.cache.get(ticketId);
+					if (!channel) continue;
+					const { guild } = await client.prisma.ticket.findUnique({
+						select: { guild: true },
+						where: { id: ticketId },
+					});
+					const getMessage = client.i18n.getLocale(guild.locale);
+					await channel.send({
+						embeds: [
+							new ExtendedEmbedBuilder()
+								.setColor(guild.primaryColour)
+								.setTitle(getMessage('ticket.closing_soon.title'))
+								.setDescription(getMessage('ticket.closing_soon.description', { timestamp: Math.floor($.closeAt / 1000) })),
+						],
+					});
+				} else if ($.closeAt < Date.now()) {
+					client.tickets.finallyClose(ticketId, $.reason);
+				}
+			}
 
-			// for (const [ticketId, $] of client.tickets.$stale) {
-			// 	// ⌛
-			// }
-		}, ms('5m'));
+			const guilds = await client.prisma.guild.findMany({
+				include: {
+					tickets: {
+						include: { category: true },
+						where: { open: true },
+					},
+				},
+				// where: { staleAfter: { not: null } },
+				where: { staleAfter: { gte: staleInterval } },
+			});
+
+			// set inactive tickets as stale
+			for (const guild of guilds) {
+				for (const ticket of guild.tickets) {
+				// if (ticket.lastMessageAt && ticket.lastMessageAt < Date.now() - guild.staleAfter)
+					if (ticket.lastMessageAt && Date.now() - ticket.lastMessageAt > guild.staleAfter) {
+					/** @type {import("discord.js").TextChannel} */
+						const channel = client.channels.cache.get(ticket.id);
+						const messages = (await channel.messages.fetch({ limit: 5 })).filter(m => m.author.id !== client.user.id);
+						let ping = '';
+
+						if (messages.size > 0) {
+							const lastMessage =  messages.first();
+							const staff = await isStaff(channel.guild, lastMessage.author.id);
+							if (staff) ping = lastMessage.author.toString();
+							else ping = ticket.category.pingRoles.map(r => `<@&${r}>`).join(' ');
+						}
+
+						const getMessage = client.i18n.getLocale(guild.locale);
+						const closeComamnd = client.application.commands.cache.find(c => c.name === 'close');
+						const sent = await channel.send({
+							components: [
+								new ActionRowBuilder()
+									.addComponents(
+										new ButtonBuilder()
+											.setCustomId(JSON.stringify({ action: 'close' }))
+											.setStyle(ButtonStyle.Danger)
+											.setEmoji(getMessage('buttons.close.emoji'))
+											.setLabel(getMessage('buttons.close.text')),
+									),
+							],
+							content: ping,
+							embeds: [
+								new ExtendedEmbedBuilder({
+									iconURL: channel.guild.iconURL(),
+									text: guild.footer,
+								})
+									.setColor(guild.primaryColour)
+									.setTitle(getMessage('ticket.inactive.title'))
+									.setDescription(getMessage('ticket.inactive.description', {
+										close: `</${closeComamnd.name}:${closeComamnd.id}>`,
+										timestamp: Math.floor(ticket.lastMessageAt.getTime() / 1000),
+									})),
+							],
+						});
+
+						client.tickets.$stale.set(ticket.id, {
+							closeAt: guild.autoClose ? Date.now() + guild.autoClose : null,
+							closedBy: null,
+							message: sent,
+							messages: 0,
+							reason: 'inactivity',
+							staleSince: Date.now(),
+						});
+					}
+				}
+			}
+		}, staleInterval);
 	}
 };