diff --git a/README.md b/README.md
index 2458913..0690e5b 100644
--- a/README.md
+++ b/README.md
@@ -38,6 +38,7 @@ You can also pass the following environment variables to override the defaults:
     -e RESTIC_KEEP_DAILY='7'
     -e RESTIC_KEEP_WEEKLY='4'
     -e RESTIC_KEEP_MONTHLY='12'
+    -e RESTIC_KEEP_YEARLY='7'
 
 You can backup 5 different database clusters with `PG*_[1..5]`, and assign an arbitrary hostname with `HOSTNAME_[1..5]` (if `PGHOST` is not a fully qualified domain name) environment variables.
 
diff --git a/bin/prune.sh b/bin/prune.sh
index 5f451c6..1bafd47 100755
--- a/bin/prune.sh
+++ b/bin/prune.sh
@@ -10,7 +10,8 @@ while ! restic forget \
 		--keep-hourly="${RESTIC_KEEP_HOURLY:-24}" \
 		--keep-daily="${RESTIC_KEEP_DAILY:-7}" \
 		--keep-weekly="${RESTIC_KEEP_WEEKLY:-4}" \
-		--keep-monthly="${RESTIC_KEEP_MONTHLY:-12}"; do
+		--keep-monthly="${RESTIC_KEEP_MONTHLY:-12}" \
+		--keep-yearly="${RESTIC_KEEP_YEARLY:-7}"; do
 	echo "Sleeping for 10 seconds before retry..."
 	sleep 10
 done
diff --git a/docker-compose.yml b/docker-compose.yml
index 9f20b6c..7b496dc 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -16,6 +16,7 @@ services:
       # RESTIC_KEEP_DAILY: 7
       # RESTIC_KEEP_WEEKLY: 4
       # RESTIC_KEEP_MONTHLY: 12
+      # RESTIC_KEEP_YEARLY: 7
       RESTIC_PASSWORD:
       RESTIC_REPOSITORY:
     image: interaction/restic-pg-dump