diff --git a/config/services/hydra/default.nix b/config/services/hydra/default.nix
index e3cea02..2bd0cc2 100644
--- a/config/services/hydra/default.nix
+++ b/config/services/hydra/default.nix
@@ -30,8 +30,8 @@
     extraConfig = ''
       server_store_uri = https://cache.kyouma.net
       binary_cache_public_uri = https://cache.kyouma.net
-      evaluator_workers = 8
-      evaluator_max_memory_size = 16384
+      evaluator_workers = 6
+      evaluator_max_memory_size = 12288
       max_output_size = ${builtins.toString (24 * 1024 * 1024 * 1024)}
     '';
   };