diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
new file mode 100644
index 0000000..dd61744
--- /dev/null
+++ b/.github/workflows/build.yml
@@ -0,0 +1,17 @@
+name: build
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: "14"
+      - run: npm install
+      - run: npm run build
+      - name: check dist files
+        run: |
+          [[ $(git status --porcelain | tee /dev/stderr | wc -l) -eq 0 ]]
+      - run: npm test
diff --git a/.gitignore b/.gitignore
index be8362d..0384091 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+/package-lock.json
 *.gz
 
 # ---> Node
diff --git a/build.sh b/build.sh
index 5779634..c72047d 100644
--- a/build.sh
+++ b/build.sh
@@ -2,9 +2,9 @@
 
 # TODO convert to JS
 cat parser.js packer.js > all.tmp.js
-sed -i '' '/use strict/d' all.tmp.js
-sed -i '' '/require/d' all.tmp.js
-sed -i '' '/exports/d' all.tmp.js
+sed -i '/use strict/d' all.tmp.js
+sed -i '/require/d' all.tmp.js
+sed -i '/exports/d' all.tmp.js
 
 echo ';(function () {' > dist/asn1.js
 echo "'use strict';" >> dist/asn1.js
diff --git a/package-lock.json b/package-lock.json
deleted file mode 100644
index 1455d1e..0000000
--- a/package-lock.json
+++ /dev/null
@@ -1,19 +0,0 @@
-{
-	"name": "@root/asn1",
-	"version": "1.0.0",
-	"lockfileVersion": 1,
-	"requires": true,
-	"dependencies": {
-		"@root/encoding": {
-			"version": "1.0.1",
-			"resolved": "https://registry.npmjs.org/@root/encoding/-/encoding-1.0.1.tgz",
-			"integrity": "sha512-OaEub02ufoU038gy6bsNHQOjIn8nUjGiLcaRmJ40IUykneJkIW5fxDqKxQx48cszuNflYldsJLPPXCrGfHs8yQ=="
-		},
-		"@root/pem": {
-			"version": "1.0.3",
-			"resolved": "https://registry.npmjs.org/@root/pem/-/pem-1.0.3.tgz",
-			"integrity": "sha512-6iFwsbwm6YzWdfjogHzLTYkA1KWdeEkutVX2BBVfhyWoE9q0vp89G7mAcLIhi0QTRd199AMOacHWFq+gTyQkVA==",
-			"dev": true
-		}
-	}
-}
diff --git a/package.json b/package.json
index b983dc6..6f977e2 100644
--- a/package.json
+++ b/package.json
@@ -13,6 +13,7 @@
 		"dist"
 	],
 	"scripts": {
+		"build": "bash build.sh",
 		"test": "node tests"
 	},
 	"repository": {
@@ -28,7 +29,8 @@
 	"author": "AJ ONeal <coolaj86@gmail.com> (https://coolaj86.com/)",
 	"license": "MPL-2.0",
 	"devDependencies": {
-		"@root/pem": "^1.0.3"
+		"@root/pem": "^1.0.4",
+		"uglify-js": "^3.10.0"
 	},
 	"dependencies": {
 		"@root/encoding": "^1.0.1"