diff --git a/.gitignore b/.gitignore
index cf97db2..46c6ef0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 node_modules
 dist
+lib
 coverage
 *.log
diff --git a/.npmignore b/.npmignore
index 5e5cab4..4812941 100644
--- a/.npmignore
+++ b/.npmignore
@@ -1,5 +1,9 @@
 test
 coverage
+flow-typed
+src
+test
 .circleci
 .flowconfig
-flow-typed
+webpack.config.js
+yarn.lock
\ No newline at end of file
diff --git a/package.json b/package.json
index 6abb2af..7c486f2 100644
--- a/package.json
+++ b/package.json
@@ -1,9 +1,8 @@
 {
   "name": "react-dfb",
-  "version": "1.0.0",
+  "version": "1.0.2",
   "description": "A button to allow to download file without href link",
-  "main": "dist/index.js",
-  "es6": "src/index.js",
+  "main": "lib/index.js",
   "license": "MIT",
   "author": {
     "name": "Hugo Capocci",
@@ -48,6 +47,7 @@
     "enzyme": "3.4.4",
     "enzyme-adapter-react-16": "1.2.0",
     "flow-bin": "0.79.1",
+    "flow-copy-source": "2.0.2",
     "jest": "23.5.0",
     "react": "16.4.2",
     "react-dom": "16.4.2",
@@ -58,9 +58,15 @@
   "scripts": {
     "flow": "flow",
     "prepublish:old": "yarn flow && yarn test",
-    "prepare": "yarn build",
+    "prepare": "webpack && yarn build-js && yarn build-flow",
     "test": "jest",
-    "build": "webpack ",
+    "build-js": "babel src -d lib --ignore *.test.jsx",
+    "build-flow": "flow-copy-source src lib -i *.test.*",
     "build-analyse": "ANALYSE_BUNDLE=true webpack"
-  }
+  },
+  "files": [
+    "README.md",
+    "dist/",
+    "lib/"
+  ]
 }
diff --git a/src/index.jsx b/src/index.jsx
index 8a81ad3..2fd9d3d 100644
--- a/src/index.jsx
+++ b/src/index.jsx
@@ -18,10 +18,7 @@ type Props = {
   label?: string,
 };
 
-type State = {};
-
-class DownloadButton extends React.Component<Props, State> {
-  state = {};
+class DownloadButton extends React.Component<Props> {
   static defaultProps = {
     disabled: false,
     downloadData: {
diff --git a/yarn.lock b/yarn.lock
index 3b2e5e4..9d22c90 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1469,7 +1469,7 @@ chokidar@^1.6.1:
   optionalDependencies:
     fsevents "^1.0.0"
 
-chokidar@^2.0.2:
+chokidar@^2.0.0, chokidar@^2.0.2:
   version "2.0.4"
   resolved "https://registry.yarnpkg.com/chokidar/-/chokidar-2.0.4.tgz#356ff4e2b0e8e43e322d18a372460bbcf3accd26"
   dependencies:
@@ -1552,7 +1552,7 @@ code-point-at@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/code-point-at/-/code-point-at-1.1.0.tgz#0d070b4d043a5bea33a2f1a40e2edb3d9a4ccf77"
 
-codecov@^3.0.4:
+codecov@3.0.4:
   version "3.0.4"
   resolved "https://registry.yarnpkg.com/codecov/-/codecov-3.0.4.tgz#37f2bf9ed71086923aac7496d982e32e5899dfd8"
   dependencies:
@@ -2429,6 +2429,16 @@ flow-bin@0.79.1:
   version "0.79.1"
   resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.79.1.tgz#01c9f427baa6556753fa878c192d42e1ecb764b6"
 
+flow-copy-source@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/flow-copy-source/-/flow-copy-source-2.0.2.tgz#096e579a9bb63a38afc5d4dd68ac847a5be27594"
+  dependencies:
+    chokidar "^2.0.0"
+    fs-extra "^7.0.0"
+    glob "^7.0.0"
+    kefir "^3.7.3"
+    yargs "^12.0.1"
+
 flush-write-stream@^1.0.0:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/flush-write-stream/-/flush-write-stream-1.0.3.tgz#c5d586ef38af6097650b49bc41b55fabb19f35bd"
@@ -2479,6 +2489,14 @@ from2@^2.1.0:
     inherits "^2.0.1"
     readable-stream "^2.0.0"
 
+fs-extra@^7.0.0:
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-7.0.0.tgz#8cc3f47ce07ef7b3593a11b9fb245f7e34c041d6"
+  dependencies:
+    graceful-fs "^4.1.2"
+    jsonfile "^4.0.0"
+    universalify "^0.1.0"
+
 fs-minipass@^1.2.5:
   version "1.2.5"
   resolved "https://registry.yarnpkg.com/fs-minipass/-/fs-minipass-1.2.5.tgz#06c277218454ec288df77ada54a03b8702aacb9d"
@@ -2572,7 +2590,7 @@ glob-parent@^3.1.0:
     is-glob "^3.1.0"
     path-dirname "^1.0.0"
 
-glob@^7.0.3, glob@^7.1.1:
+glob@^7.0.0, glob@^7.0.3, glob@^7.1.1:
   version "7.1.3"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.3.tgz#3960832d3f1574108342dafd3a67b332c0969df1"
   dependencies:
@@ -2602,7 +2620,7 @@ globals@^9.18.0:
   version "9.18.0"
   resolved "https://registry.yarnpkg.com/globals/-/globals-9.18.0.tgz#aa3896b3e69b487f17e31ed2143d69a8e30c2d8a"
 
-graceful-fs@^4.1.11, graceful-fs@^4.1.2, graceful-fs@^4.1.4:
+graceful-fs@^4.1.11, graceful-fs@^4.1.2, graceful-fs@^4.1.4, graceful-fs@^4.1.6:
   version "4.1.11"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.11.tgz#0e8bdfe4d1ddb8854d64e04ea7c00e2a026e5658"
 
@@ -3554,6 +3572,12 @@ json5@^0.5.0, json5@^0.5.1:
   version "0.5.1"
   resolved "https://registry.yarnpkg.com/json5/-/json5-0.5.1.tgz#1eade7acc012034ad84e2396767ead9fa5495821"
 
+jsonfile@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/jsonfile/-/jsonfile-4.0.0.tgz#8771aae0799b64076b76640fca058f9c10e33ecb"
+  optionalDependencies:
+    graceful-fs "^4.1.6"
+
 jsprim@^1.2.2:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/jsprim/-/jsprim-1.4.1.tgz#313e66bc1e5cc06e438bc1b7499c2e5c56acb6a2"
@@ -3563,6 +3587,12 @@ jsprim@^1.2.2:
     json-schema "0.2.3"
     verror "1.10.0"
 
+kefir@^3.7.3:
+  version "3.8.3"
+  resolved "https://registry.yarnpkg.com/kefir/-/kefir-3.8.3.tgz#8e0ab10084ed8a01cbb5d4f7f18a0b859f7b9bd9"
+  dependencies:
+    symbol-observable "1.0.4"
+
 kind-of@^3.0.2, kind-of@^3.0.3, kind-of@^3.2.0:
   version "3.2.2"
   resolved "https://registry.yarnpkg.com/kind-of/-/kind-of-3.2.2.tgz#31ea21a734bab9bbb0f32466d893aea51e4a3c64"
@@ -5301,6 +5331,10 @@ supports-color@^5.3.0, supports-color@^5.4.0:
   dependencies:
     has-flag "^3.0.0"
 
+symbol-observable@1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/symbol-observable/-/symbol-observable-1.0.4.tgz#29bf615d4aa7121bdd898b22d4b3f9bc4e2aa03d"
+
 symbol-tree@^3.2.2:
   version "3.2.2"
   resolved "https://registry.yarnpkg.com/symbol-tree/-/symbol-tree-3.2.2.tgz#ae27db38f660a7ae2e1c3b7d1bc290819b8519e6"
@@ -5510,6 +5544,10 @@ unique-slug@^2.0.0:
   dependencies:
     imurmurhash "^0.1.4"
 
+universalify@^0.1.0:
+  version "0.1.2"
+  resolved "https://registry.yarnpkg.com/universalify/-/universalify-0.1.2.tgz#b646f69be3942dabcecc9d6639c80dc105efaa66"
+
 unpipe@1.0.0, unpipe@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/unpipe/-/unpipe-1.0.0.tgz#b2bf4ee8514aae6165b4817829d21b2ef49904ec"