diff --git a/package.json b/package.json
index 3c05faa..013fb0d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "d3-quadtree",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "description": "Two-dimensional recursive spatial subdivision.",
   "keywords": [
     "d3",