diff --git a/README.md b/README.md
index 1a92eab..8613670 100644
--- a/README.md
+++ b/README.md
@@ -10,15 +10,17 @@ Assert with status codes. Like ctx.throw() in Koa, but with a guard.
 
 ## Example
 ```js
-var assert = require('http-assert');
-var ok = require('assert');
+var assert = require('http-assert')
+var ok = require('assert')
+
+var username = 'foobar' // username from request
 
 try {
-  assert(username == 'fjodor', 401, 'authentication failed');
+  assert(username === 'fjodor', 401, 'authentication failed')
 } catch (err) {
-  ok(err.status == 401);
-  ok(err.message == 'authentication failed');
-  ok(err.expose);
+  ok(err.status === 401)
+  ok(err.message === 'authentication failed')
+  ok(err.expose)
 }
 ```
 
diff --git a/package.json b/package.json
index cc9c947..c02eddf 100644
--- a/package.json
+++ b/package.json
@@ -16,6 +16,7 @@
     "eslint": "5.5.0",
     "eslint-config-standard": "12.0.0",
     "eslint-plugin-import": "2.14.0",
+    "eslint-plugin-markdown": "1.0.0-beta.6",
     "eslint-plugin-node": "7.0.1",
     "eslint-plugin-promise": "4.0.0",
     "eslint-plugin-standard": "4.0.0",
@@ -30,7 +31,7 @@
     "node": ">= 0.8"
   },
   "scripts": {
-    "lint": "eslint .",
+    "lint": "eslint --plugin markdown --ext js,md .",
     "test": "mocha --reporter spec --bail --check-leaks test/",
     "test-cov": "istanbul cover node_modules/mocha/bin/_mocha -- --reporter dot --check-leaks test/",
     "test-travis": "istanbul cover node_modules/mocha/bin/_mocha --report lcovonly -- --reporter spec --check-leaks test/"