diff --git a/package.json b/package.json
index 4f10dc5..cc0e4e3 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "d3-random",
-  "version": "2.2.0",
+  "version": "2.2.1",
   "description": "Generate random numbers from various distributions.",
   "keywords": [
     "d3",