diff --git a/package.json b/package.json
index e84d535..f918e56 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
 		"url": "git@github.com:natlibfi/marc-record-merge-js.git"
 	},
 	"license": "LGPL-3.0+",
-	"version": "6.0.0",
+	"version": "6.0.0-beta.1",
 	"main": "./dist/index.js",
 	"engines": {
 		"node": ">=12"