diff --git a/buckler_aiohttp.py b/buckler_aiohttp.py
index d5b6dbb..11e4dae 100644
--- a/buckler_aiohttp.py
+++ b/buckler_aiohttp.py
@@ -48,13 +48,13 @@ async def buckler_session(request, handler):
 			resp.set_cookie(
 				'userid',
 				user_id,
-				mas_age=30*24*60*60,
+				max_age=30*24*60*60,
 				secure=True,
 				http_only=True)
 			resp.set_cookie(
 				'session',
 				user_sid,
-				mas_age=30*24*60*60,
+				max_age=30*24*60*60,
 				secure=True,
 				http_only=True)