diff --git a/package.json b/package.json
index ee8abb52..e3f325cf 100644
--- a/package.json
+++ b/package.json
@@ -30,9 +30,6 @@
     "test:browser": "karma start --single-run",
     "test:coverage": "cat ./coverage/lcov.info | coveralls"
   },
-  "dependencies": {
-    "ms": "^2.1.3"
-  },
   "devDependencies": {
     "brfs": "^2.0.1",
     "browserify": "^16.2.3",
diff --git a/src/common.js b/src/common.js
index 141cb578..11e3d09a 100644
--- a/src/common.js
+++ b/src/common.js
@@ -11,7 +11,7 @@ function setup(env) {
 	createDebug.disable = disable;
 	createDebug.enable = enable;
 	createDebug.enabled = enabled;
-	createDebug.humanize = require('ms');
+	createDebug.humanize = humanize;
 	createDebug.destroy = destroy;
 
 	Object.keys(env).forEach(key => {
@@ -284,6 +284,19 @@ function setup(env) {
 		console.warn('Instance method `debug.destroy()` is deprecated and no longer does anything. It will be removed in the next major version of `debug`.');
 	}
 
+	const s = 1000;
+	const m = s * 60;
+
+	function humanize(diff) {
+		if (diff >= m) {
+			return Math.round(diff / m) + 'm';
+		}
+		if (diff >= s) {
+			return Math.round(diff / s) + 's';
+		}
+		return diff + 'ms';
+	}
+
 	createDebug.enable(createDebug.load());
 
 	return createDebug;