diff --git a/.npmignore b/.npmignore
index 4bac91a1..78a8d45d 100644
--- a/.npmignore
+++ b/.npmignore
@@ -3,7 +3,6 @@ npm-debug.log
 .vimrc.local
 t.js
 esprima.js
-escodegen.browser.js
 .travis.yml
 .npmignore
 /tmp/
diff --git a/package.json b/package.json
index 26560bc4..9941a323 100644
--- a/package.json
+++ b/package.json
@@ -12,6 +12,8 @@
         "README.md",
         "bin",
         "escodegen.js",
+        "escodegen.browser.js",
+        "escodegen.browser.min.js",
         "package.json"
     ],
     "version": "1.9.1",
@@ -56,6 +58,7 @@
         "lint": "gulp lint",
         "release": "node tools/release.js",
         "build-min": "./node_modules/.bin/cjsify -ma path: tools/entry-point.js > escodegen.browser.min.js",
-        "build": "./node_modules/.bin/cjsify -a path: tools/entry-point.js > escodegen.browser.js"
+        "build": "./node_modules/.bin/cjsify -a path: tools/entry-point.js > escodegen.browser.js",
+        "prepack": "npm run build && npm run build-min"
     }
 }