diff --git a/devcontainer.json b/devcontainer.json
index 403df31..1a25ca6 100644
--- a/devcontainer.json
+++ b/devcontainer.json
@@ -25,6 +25,7 @@
             },
             "extensions": [
                 "ms-azuretools.vscode-docker",
+                "mermaidchart.vscode-mermaid-chart",
                 "opentofu.vscode-opentofu"
             ]
         }