diff --git a/package.json b/package.json
index 05b30b0c8..2357d8ec7 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
     "chai": "^4.2.0",
     "check-engine": "^1.10.0",
     "coveralls": "^3.0.2",
-    "eslint": "^5.15.1",
+    "eslint": "^9.12.0",
     "eslint-plugin-html": "^5.0.3",
     "husky": "^4.2.3",
     "istanbul-instrumenter-loader": "^3.0.1",
diff --git a/ui/widgets/nuxeo-tag-suggestion.js b/ui/widgets/nuxeo-tag-suggestion.js
index 63070d193..5b1294fbb 100644
--- a/ui/widgets/nuxeo-tag-suggestion.js
+++ b/ui/widgets/nuxeo-tag-suggestion.js
@@ -237,6 +237,7 @@ import { escapeHTML } from './nuxeo-selectivity.js';
     }
 
     _newEntryFormatter(term) {
+      term = term?.toLowerCase();
       return { id: term, displayLabel: term, newTag: true };
     }