diff --git a/README.md b/README.md
index ed70098..1dc460a 100644
--- a/README.md
+++ b/README.md
@@ -48,6 +48,7 @@ a complete workover so that I decided to start over from scratch :-)
 
 * adb installed and in execution path
 * Ubuntu Linux (other should work, too)
+* package ``pv`` installed: ```sudo apt install -y pv```
 
 
 ## Usage