diff --git a/docs/tag_semantics.md b/docs/tag_semantics.md
index dfccfdba..f1784bb7 100644
--- a/docs/tag_semantics.md
+++ b/docs/tag_semantics.md
@@ -15,7 +15,7 @@
 
 <!-- Include: includes/repo-metadata.md -->
 
-Tags and Their Meaning
+# Tags and Their Meaning
 
 Text tags can be associated with sequencing runs and individual lanes of a run.
 Arbitrary tags are supported. Tags can be assigned both manually by the users