diff --git a/roles/mailman/files/memcached.sysconfig b/roles/mailman/files/memcached.sysconfig
index 89871762ef..18c3079edb 100644
--- a/roles/mailman/files/memcached.sysconfig
+++ b/roles/mailman/files/memcached.sysconfig
@@ -1,5 +1,5 @@
 PORT="11211"
 USER="memcached"
 MAXCONN="1024"
-CACHESIZE="4096"
+CACHESIZE="65535"
 OPTIONS=""