diff --git a/service/copyparty/copyparty.conf b/service/copyparty/copyparty.conf
index 307a1908a657de204e502f797ffa0b35d7c20ce1..e8fa31c5ce71babcff1d6fe0b98cb77a32d16020 100644
--- a/service/copyparty/copyparty.conf
+++ b/service/copyparty/copyparty.conf
@@ -9,6 +9,7 @@
   name: clover's nas
   stats, nos-dup
   dav-auth
+  cookie-cmax: 65536
   ah-alg: argon2
   xbu: c,/hooks/reject-apple-cruft.py