diff --git a/configuration.nix b/configuration.nix
index e53effc..3f4a9c9 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -53,6 +53,7 @@ in {
   services.postgresql.settings = {
     max_connections = "512";
     shared_buffers = "4096MB";
+    max_wal_size = "4096MB";
   };
 
   services.zfs = {