diff --git a/docs/04-certificate-authority.md b/docs/04-certificate-authority.md
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--- a/docs/04-certificate-authority.md
+++ b/docs/04-certificate-authority.md
@@ -1,6 +1,6 @@
 # Provisioning a CA and Generating TLS Certificates
 
-In this lab you will provision a [PKI Infrastructure](https://en.wikipedia.org/wiki/Public_key_infrastructure) using CloudFlare's PKI toolkit, [cfssl](https://github.com/cloudflare/cfssl), then use it to bootstrap a Certificate Authority, and generate TLS certificates for the following components: etcd, kube-apiserver, kube-controller-manager, kube-scheduler, kubelet, and kube-proxy.
+In this lab you will provision a [Public Key Infrastructure (PKI)](https://en.wikipedia.org/wiki/Public_key_infrastructure) using CloudFlare's PKI toolkit, [cfssl](https://github.com/cloudflare/cfssl), then use it to bootstrap a Certificate Authority, and generate TLS certificates for the following components: etcd, kube-apiserver, kube-controller-manager, kube-scheduler, kubelet, and kube-proxy.
 
 ## Certificate Authority