diff --git a/sentry-util.sh b/sentry-util.sh
index f41fad8..e3327ac 100755
--- a/sentry-util.sh
+++ b/sentry-util.sh
@@ -31,6 +31,36 @@ function backup {
   run_container "backup-volumes" "-v $backup_dir:$CONTAINER_BACKUP_BASE_DIR"
 }
 
+function restore {
+  local backup_date=$1
+
+  if [ -z "$backup_date" ]; then
+    echo 1>&2 "Vous devez spécifier une date au format YYYYMMDD en premier argument."
+    exit 1
+  fi
+
+  local backup_dir=$(readlink -f "$BACKUP_BASE_DIR/$BACKUP_DIR_PREFIX$backup_date")
+
+  if [ ! -d "$backup_dir" ]; then
+    echo 1>&2 "Le dossier de sauvegarde '$backup_dir' n'existe pas."
+    exit 1
+  fi
+
+  run_container "restore-volumes" "-v $backup_dir:$CONTAINER_BACKUP_BASE_DIR"
+}
+
+function rotate {
+  local retention=${1:-1}
+  local backup_dirs=( $(find -maxdepth 1 -type d -name "$BACKUP_DIR_PREFIX*" -printf "%f\n" | sort -r) )
+  echo "Rotating backups (retention: $retention)"
+  echo "Found ${#backup_dirs[@]} backup(s)"
+  for d in ${backup_dirs[@]:$retention}; do
+    local abs_dir="$(readlink -f $d)"
+    echo "Deleting backup '$abs_dir'"
+    rm -rf "$abs_dir"
+  done
+}
+
 function run_container {
   local docker_cmd="$1"
   local additional_docker_args="$2"
@@ -66,24 +96,6 @@ function restore-volumes {
   done
 }
 
-function restore {
-  local backup_date=$1
-
-  if [ -z "$backup_date" ]; then
-    echo 1>&2 "Vous devez spécifier une date au format YYYYMMDD en premier argument."
-    exit 1
-  fi
-
-  local backup_dir=$(readlink -f "$BACKUP_BASE_DIR/$BACKUP_DIR_PREFIX$backup_date")
-
-  if [ ! -d "$backup_dir" ]; then
-    echo 1>&2 "Le dossier de sauvegarde '$backup_dir' n'existe pas."
-    exit 1
-  fi
-
-  run_container "restore-volumes" "-v $backup_dir:$CONTAINER_BACKUP_BASE_DIR"
-}
-
 function main {
   local command=$1
   local command_args=${@:2}