diff --git a/package-overrides/github/mbostock/d3@3.3.9.json b/package-overrides/github/mbostock/d3@3.3.9.json
index b2bc680..2004285 100644
--- a/package-overrides/github/mbostock/d3@3.3.9.json
+++ b/package-overrides/github/mbostock/d3@3.3.9.json
@@ -1,5 +1,5 @@
 {
-  "main": "d3.js"
+  "main": "d3.js",
   "files": ["d3.js"],
   "buildConfig": {
     "uglify": true