diff --git a/app/modules/theme/session.server.ts b/app/modules/theme/session.server.ts
index 0311135d9..65e86d62c 100644
--- a/app/modules/theme/session.server.ts
+++ b/app/modules/theme/session.server.ts
@@ -4,6 +4,8 @@ import { isTheme } from "./provider";
 import type { Theme } from "./provider";
 import invariant from "tiny-invariant";
 
+const TEN_YEARS_IN_SECONDS = 315_360_000;
+
 if (process.env.NODE_ENV === "production") {
   invariant(process.env["SESSION_SECRET"], "SESSION_SECRET is required");
 }
@@ -17,6 +19,7 @@ const themeStorage = createCookieSessionStorage({
     sameSite: "lax",
     path: "/",
     httpOnly: true,
+    maxAge: TEN_YEARS_IN_SECONDS,
   },
 });