diff --git a/.vale.ini b/.vale.ini
index 38b57a4..c15eeb6 100644
--- a/.vale.ini
+++ b/.vale.ini
@@ -32,4 +32,5 @@ Datadog.tense = YES
 Datadog.words_case_sensitive = YES
 Datadog.words_case_insensitive = YES
 Datadog.quotes = YES
-Datadog.aws = YES
\ No newline at end of file
+Datadog.aws = YES
+Datadog.lists = YES
\ No newline at end of file
diff --git a/styles/Datadog/lists.yml b/styles/Datadog/lists.yml
new file mode 100644
index 0000000..26debd3
--- /dev/null
+++ b/styles/Datadog/lists.yml
@@ -0,0 +1,14 @@
+# This file is used to lint lists.
+extends: existence
+message: "For ordered lists at all levels, use numbers (1.) instead of letters (a.)."
+scope: raw
+nonword: true
+level: warning
+action:
+  name: edit
+  params:
+    - regex
+    - '(\n+\s*)[a-z]\. ' # pattern
+    - '$11. ' # replace
+tokens:
+  - '(?<=\n\s*)([a-z]\.) '
\ No newline at end of file