diff --git a/.yamllint b/.yamllint
index 281c9464..3878a31d 100644
--- a/.yamllint
+++ b/.yamllint
@@ -14,6 +14,7 @@ rules:
   document-start: disable
   indentation:
     spaces: consistent
+    indent-sequences: consistent
   key-duplicates:
     ignore: |
       config/testdata/section_key_dup.bad.yml
diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
index 9a1aff41..d325872b 100644
--- a/CODE_OF_CONDUCT.md
+++ b/CODE_OF_CONDUCT.md
@@ -1,3 +1,3 @@
-## Prometheus Community Code of Conduct
+# Prometheus Community Code of Conduct
 
-Prometheus follows the [CNCF Code of Conduct](https://github.com/cncf/foundation/blob/master/code-of-conduct.md).
+Prometheus follows the [CNCF Code of Conduct](https://github.com/cncf/foundation/blob/main/code-of-conduct.md).
diff --git a/SECURITY.md b/SECURITY.md
index 67741f01..fed02d85 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -3,4 +3,4 @@
 The Prometheus security policy, including how to report vulnerabilities, can be
 found here:
 
-https://prometheus.io/docs/operating/security/
+<https://prometheus.io/docs/operating/security/>