diff --git a/bundle/plantuml-previewer.vim/viewer/package-lock.json b/bundle/plantuml-previewer.vim/viewer/package-lock.json
index 942aff016..54e546984 100644
--- a/bundle/plantuml-previewer.vim/viewer/package-lock.json
+++ b/bundle/plantuml-previewer.vim/viewer/package-lock.json
@@ -3631,9 +3631,9 @@
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-      "resolved": "https://registry.npmjs.org/css-what/-/css-what-2.1.0.tgz",
-      "integrity": "sha1-lGfQMsOM+u+58teVASUwYvh/ob0=",
+      "version": "2.1.3",
+      "resolved": "https://registry.npmjs.org/css-what/-/css-what-2.1.3.tgz",
+      "integrity": "sha512-a+EPoD+uZiNfh+5fxw2nO9QwFa6nJe2Or35fGY6Ipw1R3R4AGz1d1TEZrCegvw2YTmZ0jXirGYlzxxpYSHwpEg==",
       "dev": true
     },
     "cssesc": {