diff --git a/modules/server/continuwuity.nix b/modules/server/continuwuity.nix
index fcb6960..e4b4c9c 100644
--- a/modules/server/continuwuity.nix
+++ b/modules/server/continuwuity.nix
@@ -49,6 +49,8 @@
             allow_incoming_presence = false;
             allow_outgoing_presence = false;
 
+            db_cache_capacity_mb = 512;
+
             well_known = {
               client = "https://${subdomain}";
               server = "${subdomain}:443";