diff --git a/packages/docs/src/components/mermaid.tsx b/packages/docs/src/components/mermaid.tsx
index 8325c4c..e22092d 100644
--- a/packages/docs/src/components/mermaid.tsx
+++ b/packages/docs/src/components/mermaid.tsx
@@ -31,7 +31,7 @@ function MermaidContent({ chart }: { chart: string }) {
 
   mermaid.initialize({
     startOnLoad: false,
-    securityLevel: 'loose',
+    securityLevel: 'strict',
     fontFamily: 'inherit',
     theme: resolvedTheme === 'dark' ? 'dark' : 'default',
   });