diff --git a/package-overrides/npm/d3@5.7.0.json b/package-overrides/npm/d3@5.7.0.json
index 1f4a273..9235620 100644
--- a/package-overrides/npm/d3@5.7.0.json
+++ b/package-overrides/npm/d3@5.7.0.json
@@ -1,3 +1,4 @@
 {
-  "main": "build/d3.min.js"
+  "main": "build/d3.min.js",
+  "format": "es6"
 }