diff --git a/styles/custom/SentenceCaseHeaders.yml b/styles/custom/SentenceCaseHeaders.yml
index 1d53f8ab232..d565bee6a0a 100644
--- a/styles/custom/SentenceCaseHeaders.yml
+++ b/styles/custom/SentenceCaseHeaders.yml
@@ -1,7 +1,7 @@
 extends: existence
 
 message: "Header '%s' should be in sentence case: 'Sentence case header'."
-level: error
+level: warning
 scope: heading
 ignorecase: false
 tokens: |