diff --git a/scripts/backup.sh b/scripts/backup.sh
index 16955d2..9276c78 100644
--- a/scripts/backup.sh
+++ b/scripts/backup.sh
@@ -13,7 +13,7 @@ do
     echo "trying to backup $rsync_source_path..."
     rsync_host_destination_path="$HOME$rsync_docker_destination_path";
     mkdir -p "$rsync_host_destination_path";
-    docker run --rm --volumes-from "$docker_container_name" -v "$host_backup_folder_path:$docker_backup_folder_path" "kevinveenbirkenbach/alpine-rsync" rsync -a --delete "$rsync_source_path" "$rsync_docker_destination_path";
+    docker run --rm --volumes-from "$docker_container_name" -v "$host_backup_folder_path:$docker_backup_folder_path" "kevinveenbirkenbach/alpine-rsync" sh -c "rsync -a --delete $rsync_source_path $rsync_docker_destination_path";
   done
   echo "start container: $docker_container_name" && docker start "$docker_container_name"
 done