diff --git a/matrix_puppeteer_line/rpc/client.py b/matrix_puppeteer_line/rpc/client.py
index 94129fa..2762bff 100644
--- a/matrix_puppeteer_line/rpc/client.py
+++ b/matrix_puppeteer_line/rpc/client.py
@@ -98,6 +98,12 @@ class Client(RPCClient):
 
         self.add_event_handler("receipt", wrapper)
 
+    async def on_logged_out(self, func: Callable[[], Awaitable[None]]) -> None:
+        async def wrapper(data: Dict[str, Any]) -> None:
+            await func()
+
+        self.add_event_handler("logged_out", wrapper)
+
     # TODO Type hint for sender
     async def login(self, sender, **login_data) -> AsyncGenerator[Tuple[str, str], None]:
         login_data["login_type"] = sender.command_status["login_type"]
diff --git a/matrix_puppeteer_line/user.py b/matrix_puppeteer_line/user.py
index d464063..c7344ca 100644
--- a/matrix_puppeteer_line/user.py
+++ b/matrix_puppeteer_line/user.py
@@ -101,6 +101,7 @@ class User(DBUser, BaseUser):
         state = await self.client.start()
         await self.client.on_message(self.handle_message)
         await self.client.on_receipt(self.handle_receipt)
+        await self.client.on_logged_out(self.handle_logged_out)
         if state.is_connected:
             self._track_metric(METRIC_CONNECTED, True)
         if state.is_logged_in:
@@ -176,6 +177,12 @@ class User(DBUser, BaseUser):
             await portal.create_matrix_room(self, chat_info)
         await portal.handle_remote_receipt(receipt)
 
+    async def handle_logged_out(self) -> None:
+        await self.send_bridge_notice("Logged out of LINE. Please run the \"login\" command to log back in.")
+        if self._connection_check_task:
+            self._connection_check_task.cancel()
+            self._connection_check_task = None
+
     def _add_to_cache(self) -> None:
         self.by_mxid[self.mxid] = self
 
diff --git a/puppet/src/client.js b/puppet/src/client.js
index 2c5e623..9fbd4cc 100644
--- a/puppet/src/client.js
+++ b/puppet/src/client.js
@@ -144,6 +144,14 @@ export default class Client {
 		})
 	}
 
+	sendLoggedOut() {
+		this.log("Sending logout notice to client")
+		return this._write({
+			id: --this.notificationID,
+			command: "logged_out",
+		})
+	}
+
 	handleStart = async (req) => {
 		let started = false
 		if (this.puppet === null) {
diff --git a/puppet/src/contentscript.js b/puppet/src/contentscript.js
index 2fcefdf..570caae 100644
--- a/puppet/src/contentscript.js
+++ b/puppet/src/contentscript.js
@@ -69,6 +69,10 @@ window.__mautrixExpiry = function (button) {}
  * @return {Promise<void>}
  */
 window.__mautrixReceiveMessageID = function(id) {}
+/**
+ * @return {void}
+ */
+window.__mautrixLoggedOut = function() {}
 
 /**
  * typedef ChatTypeEnum
@@ -1287,3 +1291,16 @@ new MutationObserver(() => {
 	attributeFilter: ["class"],
 	childList: true,
 })
+
+/**
+ * Watch for being logged out.
+ */
+const mainApp = document.querySelector("#mainApp")
+new MutationObserver(() => {
+	if (mainApp.classList.contains("MdNonDisp")) {
+		window.__mautrixLoggedOut()
+	}
+}).observe(mainApp, {
+	attributes: true,
+	attributeFilter: ["class"],
+})
diff --git a/puppet/src/puppet.js b/puppet/src/puppet.js
index b63a38a..805f1f8 100644
--- a/puppet/src/puppet.js
+++ b/puppet/src/puppet.js
@@ -107,6 +107,8 @@ export default class MessagesPuppeteer {
 			this._receiveReceiptDirectLatest.bind(this))
 		await this.page.exposeFunction("__mautrixReceiveReceiptMulti",
 			this._receiveReceiptMulti.bind(this))
+		await this.page.exposeFunction("__mautrixLoggedOut",
+			this._onLoggedOut.bind(this))
 		await this.page.exposeFunction("__chronoParseDate", chrono.parseDate)
 
 		// NOTE Must *always* re-login on a browser session, so no need to check if already logged in
@@ -302,7 +304,17 @@ export default class MessagesPuppeteer {
 	 * @return {Promise<boolean>} - Whether or not the session is logged in.
 	 */
 	async isLoggedIn() {
-		return await this.page.$("#wrap_message_sync") !== null
+		const selectors = [
+			"#mainApp:not(.MdNonDisp)",
+			"#wrap_message_sync",
+			"#_chat_list_body",
+		]
+		for (const selector of selectors) {
+			if (await this.page.$(selector) == null) {
+				return false
+			}
+		}
+		return true
 	}
 
 	async isPermanentlyDisconnected() {
@@ -752,4 +764,15 @@ export default class MessagesPuppeteer {
 			this.log("No client connected, not sending failure reason")
 		}
 	}
+
+	_onLoggedOut() {
+		this.log("Got logged out!")
+		this.stopObserving()
+		if (this.client) {
+			this.client.sendLoggedOut().catch(err =>
+				this.error("Failed to send logout notice to client:", err))
+		} else {
+			this.log("No client connected, not sending logout notice")
+		}
+	}
 }