diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3026b936..c5882abc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,7 +14,7 @@ Please also have a look at our
 
 ### Changed
 
-- Cleanup extra whitespace in css selector (#1398)
+- Clean up extra whitespace in CSS selector (#1398)
 - The array keys passed to `DeclarationBlock::setSelectors()` are no longer
   preserved (#1407)