diff --git a/nix/infra/backend.nix b/nix/infra/backend.nix
index 63f6a84..1d0592a 100644
--- a/nix/infra/backend.nix
+++ b/nix/infra/backend.nix
@@ -11,7 +11,7 @@ in
 {
   systemd.services.alisa-backend = {
     enable = true;
-    after = [ "network.target" ];
+    after = [ "network.target" "postgresql.service" ];
     wantedBy = [ "multi-user.target" ];
     description = "Alisa Backend API Server";
     environment = {