diff --git a/README.md b/README.md
index bb9c3bc..39b529e 100644
--- a/README.md
+++ b/README.md
@@ -29,6 +29,10 @@ GO111module=on go get github.com/haunt98/changeloguru/cmd/changeloguru
 
 ## Usage
 
+`--from` is commit in the future.
+
+`-to` is commit in the past.
+
 ```sh
 # Help
 changeloguru --help