diff --git a/apt-zfs-snapshot.conf b/apt-zfs-snapshot.conf
index 900afe4..361be7f 100644
--- a/apt-zfs-snapshot.conf
+++ b/apt-zfs-snapshot.conf
@@ -3,7 +3,7 @@ dry_run='false'
 
 # Exact package-name regular expression (without the surrounding ^ and $) for
 # packages whose snapshots use the important retention chain.
-important_names='linux-image(-.*)?|linux-headers(-.*)?|systemd|zfs-(dkms|utils)'
+important_names='linux-(firmware|headers|image)(-.*)?|systemd|zfs'
 
 # Number of snapshots retained in each chain.
 snapshots_trivial_keep='25'