diff --git a/index.js b/index.js
index ee3d6a8..330d91d 100644
--- a/index.js
+++ b/index.js
@@ -148,6 +148,6 @@ const typedArrayTypes = new Set([
 ]);
 is.typedArray = x => typedArrayTypes.has(getObjectType(x));
 
-is.withinRange = (x, [min, max]) => x >= min && x <= max;
+is.inRange = (x, arr) => is.array(arr) && (x >= Math.min.apply(Math, arr)) && (x <= Math.max.apply(Math, arr));
 
 module.exports = is;
diff --git a/test.js b/test.js
index 99917ba..5aa34a5 100644
--- a/test.js
+++ b/test.js
@@ -294,9 +294,9 @@ test('is.typedArray', t => {
 	t.false(m.typedArray({}));
 });
 
-test('is.withinRange', t => {
+test('is.inRange', t => {
 	const x = 3;
 	const arr = [0, 5];
 
-	t.true(m.withinRange(x, arr));
+	t.true(m.inRange(x, arr));
 });