diff --git a/package.json b/package.json
index c5215d4..03b11da 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "teslo",
-  "version": "0.3.1",
+  "version": "0.4.0",
   "description": "Elo rating calculator",
   "author": "William Grosset",
   "license": "MIT",