diff --git a/config/profiles/builder.nix b/config/profiles/builder.nix
index 938c684..0575934 100644
--- a/config/profiles/builder.nix
+++ b/config/profiles/builder.nix
@@ -9,7 +9,7 @@
     min-free = ${builtins.toString (4096 * 1024 * 1024)}
     max-free = ${builtins.toString (8192 * 1024 * 1024)}
     max-substitution-jobs = 20
-    max-silent-time = 7200
+    max-silent-time = 14400
   '';
   users.users.build = {
     isNormalUser = true;
diff --git a/config/services/hydra/default.nix b/config/services/hydra/default.nix
index d16f0f5..97390b4 100644
--- a/config/services/hydra/default.nix
+++ b/config/services/hydra/default.nix
@@ -29,7 +29,7 @@
       server_store_uri = https://cache.kyouma.net
       binary_cache_public_uri = https://cache.kyouma.net
       evaluator_workers = 8
-      evaluator_max_memory_size = 4096
+      evaluator_max_memory_size = 16384
     '';
   };
   services.harmonia = {