diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index cec2d84..0efcf28 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -23,6 +23,9 @@ jobs:
         run: npm i
 
       - name: Build
+        run: npm run build
+
+      - name: Create zip
         run: npm run plugin-zip
 
       - name: Archive production artifact
diff --git a/package.json b/package.json
index 1d12c1d..beee2ec 100644
--- a/package.json
+++ b/package.json
@@ -6,6 +6,7 @@
 	"author": "Mitsui <todays.mitsui@gmail.com>",
 	"license": "MIT",
 	"main": "build/index.js",
+	"files": [ "nonogram.php", "build/*" ],
 	"scripts": {
 		"start": "run-p start:wp-env start:wp-scripts",
 		"build": "wp-scripts build",