diff --git a/docs/07-bootstrapping-etcd.md b/docs/07-bootstrapping-etcd.md
index 765248c..c5e593f 100644
--- a/docs/07-bootstrapping-etcd.md
+++ b/docs/07-bootstrapping-etcd.md
@@ -55,7 +55,7 @@ ETCD_NAME=$(hostname -s)
 
 Create the `etcd.service` systemd unit file:
 
-```
+```sh
 cat <<EOF | sudo tee /etc/systemd/system/etcd.service
 [Unit]
 Description=etcd