diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 6684df68..e2009b0c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -17,5 +17,4 @@ jobs:
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm install
-      - run: npm run lint
       - run: npm test
diff --git a/.gitignore b/.gitignore
index 110bba10..7ce32f3e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,6 @@
+# Yarn lock file
+yarn.lock
+
 # Node Version Manager configuration.
 .nvmrc
 
diff --git a/Procfile b/Procfile
index 2be5f808..063b78f4 100644
--- a/Procfile
+++ b/Procfile
@@ -1 +1 @@
-web: yarn start
+web: npm start
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 00000000..3785d797
Binary files /dev/null and b/package-lock.json differ
diff --git a/package.json b/package.json
index 5e2bd45c..13883139 100644
--- a/package.json
+++ b/package.json
@@ -17,8 +17,7 @@
     "start": "node .",
     "dev": "nodemon .",
     "serve": "node server.js",
-    "test": "node test.js",
-    "lint": "xo"
+    "test": "xo && node test.js"
   },
   "bugs": {
     "url": "https://github.com/remy/mit-license/issues"
diff --git a/yarn.lock b/yarn.lock
deleted file mode 100644
index 5f184075..00000000
Binary files a/yarn.lock and /dev/null differ