diff --git a/README.md b/README.md
index c5a199e..0bf5751 100644
--- a/README.md
+++ b/README.md
@@ -125,6 +125,10 @@
 You must provide list of target files as input to it.
 Note that this hook WILL remove blank lines and does NOT respect any comments.
 
+The following arguments are available:
+- `--ignore-case` - fold lower case to upper case characters.
+- `--unique` - ensure each line is unique.
+
 #### `forbid-new-submodules`
 Prevent addition of new git submodules.