diff --git a/server.py b/server.py
index cc5430f..e199903 100644
--- a/server.py
+++ b/server.py
@@ -417,7 +417,7 @@ async def ui_login_submit(request: Request):
         value=token.access_token,
         httponly=True,
         max_age=60 * 60 * 24 * 30,  # 30 days
-        samesite="lax",
+        samesite="none",
         domain=COOKIE_DOMAIN,  # Share across subdomains
         secure=True  # Required for cross-subdomain cookies
     )
@@ -503,7 +503,7 @@ async def ui_register_submit(request: Request):
         value=token.access_token,
         httponly=True,
         max_age=60 * 60 * 24 * 30,  # 30 days
-        samesite="lax",
+        samesite="none",
         domain=COOKIE_DOMAIN,  # Share across subdomains
         secure=True  # Required for cross-subdomain cookies
     )