diff --git a/readme.md b/readme.md
index e8d26bc..128d522 100644
--- a/readme.md
+++ b/readme.md
@@ -6,7 +6,9 @@ A **simple** measure of software dependency freshness. It is a **single number**
 
 ## Usage
 
-`libyear` only supports projects using go modules. It ignores dependencies that are replaced in a go.mod file.
+`libyear` only supports projects using go modules. It ignores dependencies that are replaced in a `go.mod` file.
+
+`-h`: usage help text
 
 `-q`: quiet mode; reduce logging and output only dependencies that are not at their latest version