diff --git a/nixng/containers/hydra/postgresql.nix b/nixng/containers/hydra/postgresql.nix
index c5de5cb..fd7b7db 100644
--- a/nixng/containers/hydra/postgresql.nix
+++ b/nixng/containers/hydra/postgresql.nix
@@ -25,6 +25,10 @@ makeSystem {
 
           authentication = "host  all all all          md5";
 
+          config = {
+            max_connections = 40;
+          };
+
           ensureDatabases = [ "hydra" ];
           ensureExtensions = {
             "pg_trgm" = [ "hydra" ];