diff --git a/packages/types/package.json b/packages/types/package.json
index 79a4aa3e8..dc82cdf0d 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@opentripplanner/types",
-  "version": "3.0.1",
+  "version": "4.0.0-alpha.1",
   "description": "TypeScript types used across multiple OTP-UI packages",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",