diff --git a/hugo.yaml b/hugo.yaml
index faddbe36c0cd..9f8c9716ce9b 100644
--- a/hugo.yaml
+++ b/hugo.yaml
@@ -54,6 +54,8 @@ params:
   github_repo: https://github.com/open-telemetry/opentelemetry.io
   github_branch: main
   gcs_engine_id: bde3d634eca9cd335
+  # The following mermaid config can be dropped after we update Docsy to v0.6.0 or later
+  mermaid: { enable: true }
 
   ## Social media image path, such as Open Graph's og:image
   #