diff --git a/README.md b/README.md
index 3755299..8b939c2 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ Start with the [final report](docs/final_report.md). Supporting deliverables:
 - [Detailed development results](docs/development_results.md)
 - [Model card](docs/model_card.md)
 - [Static dashboard specification](docs/dashboard_spec.md)
-- [Private-to-public architecture](docs/architecture.mmd)
+- [Private-to-public architecture](docs/architecture.md)
 - [10-minute presentation outline](docs/presentation_outline.md)
 - [Dashboard demo script](docs/demo_script.md)