diff --git a/package-lock.json b/package-lock.json
index ec98717..e144ecc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
 	"name": "@natlibfi/marc-record",
-	"version": "9.1.0-alpha.3",
+	"version": "9.1.0-alpha.4",
 	"lockfileVersion": 3,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "@natlibfi/marc-record",
-			"version": "9.1.0-alpha.3",
+			"version": "9.1.0-alpha.4",
 			"license": "MIT",
 			"dependencies": {
 				"debug": "^4.3.7",
diff --git a/package.json b/package.json
index 5a046db..948f09d 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
 		"url": "git@github.com:natlibfi/marc-record-js.git"
 	},
 	"license": "MIT",
-	"version": "9.1.0-alpha.3",
+	"version": "9.1.0-alpha.4",
 	"main": "./dist/index.js",
 	"engines": {
 		"node": ">=18"