diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..e532369
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020 Armand Sallé
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
\ No newline at end of file
diff --git a/package.json b/package.json
index 276f207..bbc4953 100644
--- a/package.json
+++ b/package.json
@@ -5,6 +5,9 @@
   "main": "dist/bundle.cjs.js",
   "module": "dist/bundle.esm.js",
   "sideEffects": false,
+  "files": [
+    "dist"
+  ],
   "dependencies": {},
   "devDependencies": {
     "@babel/core": "^7.9.6",
@@ -35,7 +38,8 @@
     "lint:fix": "eslint 'src/*.js' --fix",
     "clean": "rimraf dist",
     "prebuild": "npm run clean",
-    "build": "rollup -c"
+    "build": "rollup -c",
+    "prepublishOnly": "npm run build"
   },
   "husky": {
     "hooks": {