diff --git a/modules/podman.nix b/modules/podman.nix
index 3bd6131..2b2885d 100644
--- a/modules/podman.nix
+++ b/modules/podman.nix
@@ -33,6 +33,10 @@
         # Prune volumes currently unused by any container
         # https://docs.podman.io/en/stable/markdown/podman-system-prune.1.html#volumes
         "--volumes"
+        # Only remove containers and images created at least one week ago.
+        # https://docs.podman.io/en/stable/markdown/podman-system-prune.1.html#filter-filters
+        # https://pkg.go.dev/maze.io/x/duration#ParseDuration
+        "--filter until=7d"
       ];
     };
   };