diff --git a/docs/09-bootstrapping-kubernetes-workers.md b/docs/09-bootstrapping-kubernetes-workers.md
index a4e8624..29da8e2 100644
--- a/docs/09-bootstrapping-kubernetes-workers.md
+++ b/docs/09-bootstrapping-kubernetes-workers.md
@@ -15,6 +15,7 @@ gcloud compute ssh worker-0
 Install the OS dependencies:
 
 ```
+sudo apt-get update
 sudo apt-get -y install socat
 ```