diff --git a/hydra-module.nix b/hydra-module.nix
index 82edd5df..1f2bdb37 100644
--- a/hydra-module.nix
+++ b/hydra-module.nix
@@ -305,6 +305,7 @@ in
         requires = [ "hydra-init.service" ];
         after = [ "hydra-init.service" ];
         environment = serverEnv;
+        restartTriggers = [ hydraConf ];
         serviceConfig =
           { ExecStart =
               "@${cfg.package}/bin/hydra-server hydra-server -f -h '${cfg.listenHost}' "
@@ -321,6 +322,7 @@ in
         requires = [ "hydra-init.service" ];
         after = [ "hydra-init.service" "network.target" ];
         path = [ cfg.package pkgs.nettools pkgs.openssh pkgs.bzip2 config.nix.package ];
+        restartTriggers = [ hydraConf ];
         environment = env // {
           PGPASSFILE = "${baseDir}/pgpass-queue-runner"; # grrr
           IN_SYSTEMD = "1"; # to get log severity levels
@@ -340,6 +342,7 @@ in
     systemd.services.hydra-evaluator =
       { wantedBy = [ "multi-user.target" ];
         requires = [ "hydra-init.service" ];
+        restartTriggers = [ hydraConf ];
         after = [ "hydra-init.service" "network.target" ];
         path = with pkgs; [ nettools cfg.package jq ];
         environment = env;