diff --git a/package.json b/package.json
index 9c0c729..2bcc8b1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "d3-selection-multi",
-  "version": "0.4.1",
+  "version": "1.0.0",
   "description": "Multi-value map syntax for D3 selections.",
   "keywords": [
     "d3",