diff --git a/README.md b/README.md
index 1b93a2e..38e1586 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,9 @@ On macOS, it has a few disadvantages compared to Time Machine - in particular it
 	 --log-dir            Set the log file directory. If this flag is set, generated files will
 	                      not be managed by the script - in particular they will not be
 	                      automatically deleted.
+     --strategy           Set the expiration strategy. Default: "1:1, 30:7, 365:30" means after one
+                          day, keep one backup per day. After 30 days, keep one backup every 7 days.
+                          After 365 days keep one backup every 30 days.
 
 ## Features