diff --git a/package.json b/package.json
index 759aaff0e..bf0a8cbb8 100644
--- a/package.json
+++ b/package.json
@@ -82,7 +82,7 @@
         "markmap-common": "0.1.2",
         "markmap-lib": "0.11.1",
         "markmap-view": "0.2.1",
-        "mermaid": "8.8.4",
+        "mermaid": "8.9.0",
         "node-sass": "4.14.1",
         "react": "17.0.1",
         "react-bootstrap": "1.4.3",
diff --git a/yarn.lock b/yarn.lock
index 5844d6a60..9d5497a6d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -9749,10 +9749,10 @@ merge2@^1.3.0:
   resolved "https://registry.yarnpkg.com/merge2/-/merge2-1.4.1.tgz#4368892f885e907455a6fd7dc55c0c9d404990ae"
   integrity sha512-8q7VEgMJW4J8tcfVPy8g09NcQwZdbwFEqhe/WZkoIzjn/3TGDwtOCYtXGxA3O8tPzpczCCDgv+P2P5y00ZJOOg==
 
-mermaid@8.8.4:
-  version "8.8.4"
-  resolved "https://registry.yarnpkg.com/mermaid/-/mermaid-8.8.4.tgz#5ea699bcfa1ef848d78b2ce8efb1e0118f30d9f7"
-  integrity sha512-YPn35uEAIrOcsDPjCiKNXXBdO1Aoazsv2zTZjG4+oXa7+tTVUb5sI81NqaTYa47RnoH9Vl4waLlEEJfB8KM9VA==
+mermaid@8.9.0:
+  version "8.9.0"
+  resolved "https://registry.yarnpkg.com/mermaid/-/mermaid-8.9.0.tgz#e569517863ab903aa5389cd746b68ca958a8ca7c"
+  integrity sha512-J582tyE1vkdNu4BGgfwXnFo4Mu6jpuc4uK96mIenavaak9kr4T5gaMmYCo/7edwq/vTBkx/soZ5LcJo5WXZ1BQ==
   dependencies:
     "@braintree/sanitize-url" "^3.1.0"
     d3 "^5.7.0"