diff --git a/README.md b/README.md
index 33ceeb7..d987624 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,8 @@ jobs:
 - `tool-versions` - **Optional**. String.
   - Stating a relative or absolute path to the `.tool-versions` file.
   - Should be used only if `scarb-version` is not specified.
+- `scarb-lock` - **Optional**. String.
+  - Stating a relative or absolute path to the `Scarb.lock` file.
 
 ## Outputs