diff --git a/HISTORY.md b/HISTORY.md
index 4695bb0..6812655 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,3 +1,6 @@
+2.0.1 / 2025-03-27
+==========
+
 2.0.0 / 2024-08-31
 ==========
 
diff --git a/index.js b/index.js
index a5f1109..e773845 100644
--- a/index.js
+++ b/index.js
@@ -116,27 +116,19 @@ function hasbody (req) {
  *
  *     this.is('html'); // => false
  *
- * @param {String|Array} types...
- * @return {String|false|null}
+ * @param {Object} req
+ * @param {(String|Array)} types...
+ * @return {(String|false|null)}
  * @public
  */
 
 function typeofrequest (req, types_) {
-  var types = types_
-
   // no body
-  if (!hasbody(req)) {
-    return null
-  }
-
+  if (!hasbody(req)) return null
   // support flattened arguments
-  if (arguments.length > 2) {
-    types = new Array(arguments.length - 1)
-    for (var i = 0; i < types.length; i++) {
-      types[i] = arguments[i + 1]
-    }
-  }
-
+  var types = arguments.length > 2
+    ? Array.prototype.slice.call(arguments, 1)
+    : types_
   // request content type
   var value = req.headers['content-type']
 
@@ -215,9 +207,9 @@ function mimeMatch (expected, actual) {
   }
 
   // validate suffix wildcard
-  if (expectedParts[1].substr(0, 2) === '*+') {
+  if (expectedParts[1].slice(0, 2) === '*+') {
     return expectedParts[1].length <= actualParts[1].length + 1 &&
-      expectedParts[1].substr(1) === actualParts[1].substr(1 - expectedParts[1].length)
+      expectedParts[1].slice(1) === actualParts[1].slice(1 - expectedParts[1].length)
   }
 
   // validate subtype
@@ -232,36 +224,26 @@ function mimeMatch (expected, actual) {
  * Normalize a type and remove parameters.
  *
  * @param {string} value
- * @return {string}
+ * @return {(string|null)}
  * @private
  */
-
 function normalizeType (value) {
-  // parse the type
+  // Parse the type
   var type = contentType.parse(value).type
 
-  if (!typer.test(type)) {
-    return null
-  }
-
-  return type
+  return typer.test(type) ? type : null
 }
 
 /**
  * Try to normalize a type and remove parameters.
  *
  * @param {string} value
- * @return {string}
+ * @return {(string|null)}
  * @private
  */
-
 function tryNormalizeType (value) {
-  if (!value) {
-    return null
-  }
-
   try {
-    return normalizeType(value)
+    return value ? normalizeType(value) : null
   } catch (err) {
     return null
   }
diff --git a/package.json b/package.json
index 83c572e..08586d2 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "type-is",
   "description": "Infer the content-type of a request.",
-  "version": "2.0.0",
+  "version": "2.0.1",
   "contributors": [
     "Douglas Christopher Wilson <doug@somethingdoug.com>",
     "Jonathan Ong <me@jongleberry.com> (http://jongleberry.com)"