diff --git a/nixos/module/ephemeral.nix b/nixos/module/ephemeral.nix
index a757c7c..d8d9ac4 100644
--- a/nixos/module/ephemeral.nix
+++ b/nixos/module/ephemeral.nix
@@ -112,7 +112,7 @@ let
     };
     "/etc/credstore.encrypted" = {
       options = [ "nodev" "noexec" "nosuid" ];
-      extraOptions = [ "noatime" ];
+      extraOptions = [ "noatime" "compress=zstd" ];
     };
     "/nix" = {
       options = [ "nodev" "nosuid" ];