diff --git a/config/services/hydra/nix-config.nix b/config/services/hydra/nix-config.nix
index 0046f13..03bb8f6 100644
--- a/config/services/hydra/nix-config.nix
+++ b/config/services/hydra/nix-config.nix
@@ -25,7 +25,7 @@
     {
       hostName = "schrodinger.kyouma.net";
       sshUser = "root";
-      maxJobs = 0;
+      maxJobs = 2;
       speedFactor = 20;
       systems = [ "riscv64-linux" ];
       supportedFeatures = base ++ riscv64;