diff --git a/README.md b/README.md
index c93d6ff..399c8bd 100644
--- a/README.md
+++ b/README.md
@@ -47,7 +47,7 @@ To sweep expired tokens from your db you should add
 
 ```elixir
 children = [
-  {Guardian.DB.Sweeper, [interval: 60]}
+  {Guardian.DB.Sweeper, [interval: 60 * 60 * 1000]} # 1 hour
 ]
 ```