diff --git a/README.md b/README.md
index 6b40dd9..81e9df4 100644
--- a/README.md
+++ b/README.md
@@ -71,7 +71,7 @@ E.g.
 * `RESTIC_PASSWORD` - Password for the restic repository. Will also be used to initialize the repository if it is not yet initialized
 * `RESTIC_BACKUP_ARGS` - If specified `restic backup` is run with the given arguments, e.g. for tags, exclude definitions, or verbose logging: `--tag docker-volumes --exclude-file='exclude.txt' --verbose`. See the [restic backup documentation](https://restic.readthedocs.io/en/stable/040_backup.html) for available options
 * `RESTIC_BACKUP_TAGS` - *Deprecated*. Tags to set for each snapshot, separated by commas. This option will soon be removed. Please use `RESTIC_BACKUP_ARGS` to define tags.
-* `RESTIC_FORGET_ARGS` - If specified `restic forget` is run with the given arguments after each backup, e.g. `--prune --keep-last 14 --keep-daily 1`. See the [restic forget documentation](https://restic.readthedocs.io/en/stable/060_forget.html) for available options
+* `RESTIC_FORGET_ARGS` - If specified `restic forget` is run with the given arguments after each backup or before every prune, e.g. `--prune --keep-last 14 --keep-daily 1`. See the [restic forget documentation](https://restic.readthedocs.io/en/stable/060_forget.html) for available options
 * `RESTIC_PRUNE_ARGS` - If specified `restic prune` is run with the given arguments, e.g. for B2 concurrent connection settings and verbose logging: `-o b2.connections=10 --verbose`.
 * `RESTIC_CHECK_ARGS` - If specified `restic check` is run with the given arguments, e.g. `--read-data-subset=10%` to check a randomly choosen subset (10%) of the repository pack files. Without option, only the structure of the repository is checked. The option `--read-data-subset` will also check data, at the cost of transfering them from the repository.; e.g. for B2 concurrent connection settings and verbose logging: `-o b2.connections=10 --verbose`.
 * (Additional variables as needed for the chosen backup target. E.g. `B2_ACCOUNT_ID` and `B2_ACCOUNT_KEY` for Backblaze B2. See official restic documentation about [supported environment variables](https://restic.readthedocs.io/en/stable/040_backup.html#environment-variables).)
diff --git a/prune b/prune
index 1d2f4c1..d43bec3 100755
--- a/prune
+++ b/prune
@@ -16,6 +16,12 @@ main() {
   run_commands "${PRE_COMMANDS:-}"
 
   start=$(date +%s)
+
+  if [ -n "${RESTIC_FORGET_ARGS}" ]; then
+    echo Forget about old snapshots based on RESTIC_FORGET_ARGS = ${RESTIC_FORGET_ARGS}
+    restic forget ${RESTIC_FORGET_ARGS}
+  fi
+
   echo Starting prune at "$(date +"%Y-%m-%d %H:%M:%S")"
 
   set +e