diff --git a/server/app.js b/server/app.js
index f8ffe95..f4933f1 100644
--- a/server/app.js
+++ b/server/app.js
@@ -441,9 +441,16 @@ export function createApp({ db, root, env = process.env } = {}) {
 				.json({ ok: false, code: e.code, error: e.message });
 		}
 	});
-	app.get("/", (_q, res) =>
-		res.sendFile(path.join(root, "public", "landing.html")),
-	);
+	app.get("/", async (req, res, next) => {
+		try {
+			// Returning users should not be left on the sign-in page after a successful login.
+			if (await session(req)) return res.status(302).location("/app").end();
+			res.set("Cache-Control", "no-store, private");
+			res.sendFile(path.join(root, "public", "landing.html"));
+		} catch (error) {
+			next(error);
+		}
+	});
 	app.get("/app", requireAuth, (_q, res) =>
 		res.sendFile(path.join(root, "public", "index.html")),
 	);