diff --git a/README.md b/README.md
index 6b5711d..fb102cc 100644
--- a/README.md
+++ b/README.md
@@ -60,6 +60,12 @@ As a common example, if you sleep all of your staging/ephemeral deployments for
       ingresses:
       - name: your-app-ingress
 
+        # (optional, defaults to all deployments) specify which deployments
+        # must be up to wake this ingress
+        requires:
+          deployments:
+          - name: your-app-frontend
+
       # (optional, defaults to UTC) the timezone to use for the input times above
       timezone: 'America/New_York'
     ```