diff --git a/packages/mermaid/src/schemas/config.schema.yaml b/packages/mermaid/src/schemas/config.schema.yaml
index 30d6a6024..027cf9ff7 100644
--- a/packages/mermaid/src/schemas/config.schema.yaml
+++ b/packages/mermaid/src/schemas/config.schema.yaml
@@ -156,7 +156,7 @@ properties:
       in the current `currentConfig`.
 
       This prevents malicious graph directives from overriding a site's default security.
-    default: ['secure', 'securityLevel', 'startOnLoad', 'maxTextSize']
+    default: ['secure', 'securityLevel', 'startOnLoad', 'maxTextSize', 'maxEdges']
     type: array
     items:
       type: string