diff --git a/debian/patches/0520-add-system-lib-path-for-webpack.patch b/debian/patches/0520-add-system-lib-path-for-webpack.patch
index 02ec4af5c6..8619684706 100644
--- a/debian/patches/0520-add-system-lib-path-for-webpack.patch
+++ b/debian/patches/0520-add-system-lib-path-for-webpack.patch
@@ -4,7 +4,7 @@
  
    resolve: {
      extensions: ['.js'],
-+    modules: ['/usr/share/gitlab/node_modules', '/usr/lib/nodejs'],
++    modules: ['/usr/share/gitlab/node_modules','/usr/share/gitlab/node_modules/mermaid/node_modules', '/usr/lib/nodejs'],
      alias: {
        '~': path.join(ROOT_PATH, 'app/assets/javascripts'),
        emojis: path.join(ROOT_PATH, 'fixtures/emojis'),