diff --git a/README.md b/README.md
index 00599f1..4a841f3 100644
--- a/README.md
+++ b/README.md
@@ -81,6 +81,9 @@ Full list of command line arguments:
   --device 2443de990e017ece
                         device identifier. Should be used only when multiple
                         devices are connected at once
+  --old                 add this flag to use an old version of uiautomator.
+                        Use it only if you experience problems with the
+                        default version
 ```
 
 ### FAQ