diff --git a/src/server/helpers/with-page-auth-required.ts b/src/server/helpers/with-page-auth-required.ts
index 41af2dfe..f07046b8 100644
--- a/src/server/helpers/with-page-auth-required.ts
+++ b/src/server/helpers/with-page-auth-required.ts
@@ -196,7 +196,7 @@ export const appRouteHandlerFactory =
           : opts.returnTo;
       const { redirect } = await import("next/navigation.js");
       redirect(
-        `${config.loginUrl}${opts.returnTo ? `?returnTo=${returnTo}` : ""}`
+        `${config.loginUrl}${opts.returnTo ? `?returnTo=${encodeURIComponent(returnTo)}` : ""}`
       );
     }
     return handler(params);