diff --git a/modules/e11sync/default.nix b/modules/e11sync/default.nix
index 18c02f1..045c6e0 100644
--- a/modules/e11sync/default.nix
+++ b/modules/e11sync/default.nix
@@ -63,6 +63,9 @@
               KillSignal = "SIGQUIT";
               ExecStart = "${pkg-backend}/bin/e11sync-backend";
 
+              MemoryHigh = "1535M";
+              MemoryMax = "4096M";
+              LimitNOFILE = 1048576;
               DynamicUser = true;
               NoNewPrivileges = true;
               PrivateDevices = true;