diff --git a/02-maestro_on_the_cluster.md b/02-maestro_on_the_cluster.md
index d8c178b..373262c 100644
--- a/02-maestro_on_the_cluster.md
+++ b/02-maestro_on_the_cluster.md
@@ -63,6 +63,7 @@ walltime includes quotation marks -- `"{Hours}:{Minutes}:{Seconds}"`.
 With these changes, our updated YAML file might look like
 
 ```yml
+---
 description:
     name: Hostnames
     description: Report a node's hostname.
@@ -85,9 +86,9 @@ study:
       run:
           cmd: |
             hostname >> hostname.txt
-      nodes: 1
-      procs: 1
-      walltime: "00:00:30"
+          nodes: 1
+          procs: 1
+          walltime: "00:00:30"
 ```
 
 Note that we left the rule `hostname-login` as is. Because we do not
diff --git a/md5sum.txt b/md5sum.txt
index b104c9b..aa7984b 100644
--- a/md5sum.txt
+++ b/md5sum.txt
@@ -5,7 +5,7 @@
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 "episodes/01-introduction.md" "0b246d55ad51315d3b94e1306437be9b" "site/built/01-introduction.md" "2024-06-04"
-"episodes/02-maestro_on_the_cluster.md" "5f9e3d0639774eb0cf6eaf3e24f803de" "site/built/02-maestro_on_the_cluster.md" "2024-06-04"
+"episodes/02-maestro_on_the_cluster.md" "003e9fe64cc07cb3961687fef20b3789" "site/built/02-maestro_on_the_cluster.md" "2024-06-06"
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 "episodes/04-placeholders.md" "77643387cd407aa55a9c2cc31faaec49" "site/built/04-placeholders.md" "2024-06-04"
 "episodes/05-chaining_rules.md" "09e4764020c90cc918b562ddb59f2e95" "site/built/05-chaining_rules.md" "2024-06-04"