diff --git a/book/src/voluntary-exit.md b/book/src/voluntary-exit.md
index 5a7b7a8e04..4aac647571 100644
--- a/book/src/voluntary-exit.md
+++ b/book/src/voluntary-exit.md
@@ -42,7 +42,7 @@ The exit phrase is the following:
 Below is an example for initiating a voluntary exit on the Pyrmont testnet.
 
 ```
-$ lighthouse --network pyrmont account validator exit --keystore /path/to/keystore --beacon-nodes http://localhost:5052
+$ lighthouse --network pyrmont account validator exit --keystore /path/to/keystore --beacon-node http://localhost:5052
 
 Running account manager for pyrmont network
 validator-dir path: ~/.lighthouse/pyrmont/validators