diff --git a/README.md b/README.md
index 1e5d280d..9860fd0d 100644
--- a/README.md
+++ b/README.md
@@ -116,7 +116,7 @@ The command line to run `google_auth_proxy` would look like this:
    --google-apps-domain="yourcompany.com"  \
    --upstream=http://127.0.0.1:8080/ \
    --cookie-secret=... \
-   --cookie-secure=true \
+   --cookie-https-only=true \
    --client-id=... \
    --client-secret=...
 ```