diff --git a/lib/philomena_web/endpoint.ex b/lib/philomena_web/endpoint.ex
index e09d7deb..cd2a8a28 100644
--- a/lib/philomena_web/endpoint.ex
+++ b/lib/philomena_web/endpoint.ex
@@ -46,7 +46,9 @@ defmodule PhilomenaWeb.Endpoint do
     encryption_salt: "authenticated encrypted cookie"
 
   plug Pow.Plug.Session, otp_app: :philomena
-  plug PowPersistentSession.Plug.Cookie, otp_app: :philomena
+  plug PowPersistentSession.Plug.Cookie,
+    otp_app: :philomena,
+    persistent_session_cookie_opts: [extra: "SameSite=Lax"]
 
   plug PhilomenaWeb.ReloadUserPlug
   plug PhilomenaWeb.RenderTimePlug