diff --git a/js/biome.json b/js/biome.json
index 72ae2ce8..966a8b1e 100644
--- a/js/biome.json
+++ b/js/biome.json
@@ -2,7 +2,7 @@
     "$schema": "https://biomejs.dev/schemas/1.0.0/schema.json",
     "formatter": {
         "indentStyle": "space",
-        "indentSize": 4,
+        "indentWidth": 4,
         "lineWidth": 100
     },
     "linter": {
diff --git a/js/package.json b/js/package.json
index 02577037..e638da9f 100644
--- a/js/package.json
+++ b/js/package.json
@@ -3,9 +3,9 @@
   "description": "Oxigraph JS build and tests",
   "private": true,
   "devDependencies": {
+    "@biomejs/biome": "^1.0.0",
     "@rdfjs/data-model": "^2.0.1",
-    "mocha": "^10.0.0",
-    "@biomejs/biome": "^1.0.0"
+    "mocha": "^10.0.0"
   },
   "scripts": {
     "fmt": "biome format . --write && biome check . --apply-unsafe",