diff --git a/backup_sd.sh b/backup_sd.sh
index cc46af4..32ab2fe 100644
--- a/backup_sd.sh
+++ b/backup_sd.sh
@@ -11,6 +11,8 @@
 #               dd - generating img file
 #               lsblk - grep filesize of sd card
 #               gzip - compression of img
+#
+# Install requirements:  sudo apt install pv gzip dd gzip
 
 # Find your cardslot name with cmd "lsblk"
 CARDSLOTNAME="sdb"