diff --git a/README.md b/README.md
index ab99d6f..782aa3c 100644
--- a/README.md
+++ b/README.md
@@ -10,17 +10,26 @@ Should work on any OS, if `ansible-playbook` command is available in `PATH`.
 - name: Run playbook
   uses: dawidd6/action-ansible-playbook@v2
   with:
+    # Required, playbook filepath
     playbook: deploy.yml
+    # Optional, directory where playbooks live
     directory: ./
+    # Optional, SSH private key
     key: ${{secrets.SSH_PRIVATE_KEY}}
+    # Optional, literal inventory file contents
     inventory: |
       [all]
       example.com
 
       [group1]
       example.com
+    # Optional, encrypted vault password
     vault_password: ${{secrets.VAULT_PASSWORD}}
+    # Optional, galaxy requirements filepath
+    requirements: galaxy-requirements.yml
+    # Optional, additional flags to pass to ansible-playbook
     options: |
+      --inventory .hosts
       --limit group1
       --extra-vars hello=there
       --verbose