diff --git a/.eslintrc b/.eslintrc
index aaeb295..5891fe4 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -3,3 +3,24 @@ extends: openstack
 parserOptions:
   ecmaVersion: 6
   sourceType: module
+
+rules:
+  # disallow unnecessary .call() and .apply()
+  # http://eslint.org/docs/rules/no-useless-call
+  no-useless-call: 2
+
+  # require let or const instead of var
+  # http://eslint.org/docs/rules/no-var
+  no-var: 2
+
+  # suggest using arrow functions as callbacks
+  # http://eslint.org/docs/rules/prefer-arrow-callback
+  prefer-arrow-callback: 2
+
+  # suggest using the spread operator instead of .apply().
+  # http://eslint.org/docs/rules/prefer-spread
+  prefer-spread: 2
+
+  # suggest using the rest parameters instead of arguments
+  # http://eslint.org/docs/rules/prefer-rest-params
+  prefer-rest-params: 2
diff --git a/test/unit/indexTest.js b/test/unit/indexTest.js
index f4f8d01..1b0edf2 100644
--- a/test/unit/indexTest.js
+++ b/test/unit/indexTest.js
@@ -2,7 +2,7 @@ import Test from "../../src/index.js";
 
 describe("Simple test", () => {
   it("should export a class", () => {
-    var t = new Test();
+    let t = new Test();
     expect(t).toBeDefined();
   });
 });