diff --git a/.prettierrc.js b/.prettierrc.js
index 491fdf1..a12be80 100644
--- a/.prettierrc.js
+++ b/.prettierrc.js
@@ -1,6 +1,6 @@
 module.exports = {
   singleQuote: true,
-  trailingComma: 'all',
+  trailingComma: 'es5',
   proseWrap: 'always',
   overrides: [
     {
diff --git a/Dockerfile b/Dockerfile
index c0d9ca8..ca9e604 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:alpine as builder
+FROM node:boron-alpine as builder
 WORKDIR /usr/src/app
 COPY . /usr/src/app
 RUN apk add -U build-base python && \
@@ -6,7 +6,7 @@ RUN apk add -U build-base python && \
     yarn build && \
     yarn install --production --ignore-scripts --prefer-offline
 
-FROM node:alpine
+FROM node:boron-alpine
 LABEL maintainer="butlerx@notthe.cloud"
 WORKDIR /app
 ENV NODE_ENV=production
diff --git a/lib/command.mjs b/lib/command.mjs
index a746222..378cf64 100644
--- a/lib/command.mjs
+++ b/lib/command.mjs
@@ -4,7 +4,7 @@ const localhost = host =>
 
 export default (
   { request: { headers }, client: { conn } },
-  { user, host, port, auth },
+  { user, host, port, auth }
 ) => ({
   args: localhost(host)
     ? ['login', '-h', conn.remoteAddress.split(':')[3]]
diff --git a/lib/emitter.mjs b/lib/emitter.mjs
index a4b6f55..ba428a2 100644
--- a/lib/emitter.mjs
+++ b/lib/emitter.mjs
@@ -27,7 +27,7 @@ class WeTTy extends EventEmitter {
   start(
     { user = '', host = 'localhost', auth = 'password', port = 22 },
     serverPort = 3000,
-    { key, cert },
+    { key, cert }
   ) {
     return loadSSL(key, cert).then(ssl => {
       const io = server(serverPort, ssl);
diff --git a/lib/index.mjs b/lib/index.mjs
index bc52710..f91fb83 100644
--- a/lib/index.mjs
+++ b/lib/index.mjs
@@ -71,7 +71,7 @@ export default class {
         port: sshport,
       },
       port,
-      { key: sslkey, cert: sslcert },
+      { key: sslkey, cert: sslcert }
     );
   }
 
diff --git a/lib/logger.mjs b/lib/logger.mjs
index a25a10f..26ca2df 100644
--- a/lib/logger.mjs
+++ b/lib/logger.mjs
@@ -8,9 +8,8 @@ const logger = createLogger({
     label({ label: 'Wetty' }),
     timestamp(),
     printf(
-      info =>
-        `${info.timestamp} [${info.label}] ${info.level}: ${info.message}`,
-    ),
+      info => `${info.timestamp} [${info.label}] ${info.level}: ${info.message}`
+    )
   ),
   transports: [
     new transports.Console({
diff --git a/lib/server.mjs b/lib/server.mjs
index 1707d86..23cfb44 100644
--- a/lib/server.mjs
+++ b/lib/server.mjs
@@ -33,6 +33,6 @@ export default function createServer(port, { key, cert }) {
       : http.createServer(app).listen(port, () => {
           events.server(port, 'http');
         }),
-    { path: '/wetty/socket.io' },
+    { path: '/wetty/socket.io' }
   );
 }
diff --git a/package.json b/package.json
index 13b9674..e5e9e51 100644
--- a/package.json
+++ b/package.json
@@ -30,6 +30,9 @@
   "bin": {
     "wetty": "./index.js"
   },
+  "engines": {
+    "node": ">=6.9"
+  },
   "nodemonConfig": {
     "ignore": ["dist/*", "src/*", "*.json"]
   },