diff --git a/README.md b/README.md
index a595fd8..b00dc2b 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,7 @@ Usage of ./discourse-auth-proxy:
   -sso-secret="": SSO secret for origin
   -sso-url="": SSO endpoint eg: http://discourse.forum.com
   -allow-all: don't restrict access to "admin" users on the SSO endpoint
+  -timeout="10": Read/Write timeout
 
 ```