diff --git a/modules/base.nix b/modules/base.nix
index 386571c..05994b0 100644
--- a/modules/base.nix
+++ b/modules/base.nix
@@ -65,6 +65,14 @@
   environment.systemPackages = with pkgs; [
   ];
 
+  # SystemMaxFileSize: Defaults to one eighth of the values configured with SystemMaxUse= and RuntimeMaxUse=, so that usually seven rotated journal files are kept as history.
+  # MaxFileSec: To ensure that not too much data is lost at once when old journal files are deleted, it might make sense to change this value from the default of one month.
+  # https://www.freedesktop.org/software/systemd/man/journald.conf.html
+  services.journald.extraConfig = ''
+    SystemMaxUse=800M
+    MaxFileSec=7day
+  '';
+
   # BTRFS compression.
   #
   # `nixos-generate-config` does not detect mount options, so we add them here.