diff --git a/package.json b/package.json
index fd3932c49..c0785edae 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,6 @@
   ],
   "dependencies": {
     "ckeditor5": "43.2.0",
-    "mermaid": "^9.1.4",
     "lodash-es": "^4.17.15"
   },
   "devDependencies": {
diff --git a/src/mermaidediting.js b/src/mermaidediting.js
index f4c94ca26..76299d9a7 100644
--- a/src/mermaidediting.js
+++ b/src/mermaidediting.js
@@ -5,8 +5,6 @@
 import { Plugin } from 'ckeditor5/src/core.js';
 import { toWidget } from 'ckeditor5/src/widget.js';
 
-import mermaid from 'mermaid/dist/mermaid.js';
-
 import { debounce } from 'lodash-es';
 
 import MermaidPreviewCommand from './commands/mermaidPreviewCommand.js';