diff --git a/.travis.yml b/.travis.yml
index 96c06b2..6892e2f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,3 @@
 language: node_js
-node_js:
-    - "8"
+node_js: stable
 sudo: false
-
-script:
-    - "npm test"
diff --git a/devtools-panels/devtools/panel/devtools-panel.js b/devtools-panels/devtools/panel/devtools-panel.js
index daa2ecb..5a1f35b 100644
--- a/devtools-panels/devtools/panel/devtools-panel.js
+++ b/devtools-panels/devtools/panel/devtools-panel.js
@@ -54,7 +54,7 @@ document.getElementById("button_background").addEventListener("click", () => {
 });
 
 const inspectString = "inspect(document.querySelector('h1'))";
-document.getElementById("button_h1").addEventListener("click", function(){
+document.getElementById("button_h1").addEventListener("click", () => {
     browser.devtools.inspectedWindow.eval(inspectString)
     .then(handleResult);  
 }); 
diff --git a/google-userinfo/background/authorize.js b/google-userinfo/background/authorize.js
index b49bb72..3b349c4 100644
--- a/google-userinfo/background/authorize.js
+++ b/google-userinfo/background/authorize.js
@@ -12,7 +12,7 @@ const AUTH_URL =
 const VALIDATION_BASE_URL="https://www.googleapis.com/oauth2/v3/tokeninfo";
 
 function extractAccessToken(redirectUri) {
-  let m = redirectUri.match(/[#\?](.*)/);
+  let m = redirectUri.match(/[#?](.*)/);
   if (!m || m.length < 1)
     return null;
   let params = new URLSearchParams(m[1].split("#")[0]);
diff --git a/package.json b/package.json
index 019418f..a47007c 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "version": "1.0.0",
   "description": "Example Firefox add-ons created using the WebExtensions API",
   "devDependencies": {
-    "eslint": "^3.19.0"
+    "eslint": "^4.4.1"
   },
   "repository": {
     "type": "git",