diff --git a/types/urlencode/index.d.ts b/types/urlencode/index.d.ts
index 0b70cc34be..88281a4120 100644
--- a/types/urlencode/index.d.ts
+++ b/types/urlencode/index.d.ts
@@ -3,38 +3,44 @@
 // Definitions by: My Self <https://github.com/kimcoder>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
-/*~ If this module is a UMD module that exposes a global variable 'myLib' when
- *~ loaded outside a module loader environment, declare that global here.
- *~ Otherwise, delete this declaration.
- */
-export as namespace urlencode;
+interface charsetParam {
+	charset: string;
+}
 
 /**
  * Encode string
  * @param str The string for encoding.
  */
-export function encode(str: string, charset?: string): string;
+declare function urlencode(str: string, charset?: string): string;
 
-/**
- * Decode string
- * @param encodedString The encoded string.
- */
-export function decode(encodedString: string, charset?: string): string;
+declare namespace urlencode {
+	/**
+	 * Encode string
+	 * @param str The string for encoding.
+	 */
+	function encode(str: string, charset?: string): string;
 
-/**
- * Parse querystring
- * @param queryString Querystring
- * @param charsetParam The charset for parsing
- */
-export function parse(queryString: string, charsetParam: charsetParam): any;
-export interface charsetParam {
-	charset: string;
+	/**
+	 * Decode string
+	 * @param encodedString The encoded string.
+	 */
+	function decode(encodedString: string, charset?: string): string;
+
+	/**
+	 * Parse querystring
+	 * @param queryString Querystring
+	 * @param charsetParam The charset for parsing
+	 */
+	function parse(queryString: string, charsetParam: charsetParam): any;
+	interface charsetParam {
+		charset: string;
+	}
+	/**
+	 * Stringify object
+	 * @param obj Query Object
+	 * @param charsetParam The charset for parsing
+	 */
+	function stringify(obj: any, prefix?: charsetParam, charsetParam?: charsetParam): string;
 }
-/**
- * Stringify object
- * @param obj Query Object
- * @param charsetParam The charset for parsing
- */
-export function stringify(obj: any, prefix?: charsetParam, charsetParam?: charsetParam): string;
 
-export default encode;
+export default urlencode;
diff --git a/types/urlencode/tsconfig.json b/types/urlencode/tsconfig.json
index 197f1167a4..8808d5debf 100644
--- a/types/urlencode/tsconfig.json
+++ b/types/urlencode/tsconfig.json
@@ -7,7 +7,7 @@
         "noImplicitAny": true,
         "noImplicitThis": true,
         "strictNullChecks": true,
-        "strictFunctionTypes": false,
+        "strictFunctionTypes": true,
         "baseUrl": "../",
         "typeRoots": [
             "../"
diff --git a/types/urlencode/urlencode-tests.ts b/types/urlencode/urlencode-tests.ts
index 5ee486a92b..2008ed3283 100644
--- a/types/urlencode/urlencode-tests.ts
+++ b/types/urlencode/urlencode-tests.ts
@@ -1,15 +1,15 @@
-import urlencode, { decode , parse, stringify } from 'urlencode';
+import urlencode from 'urlencode';
 
 urlencode('苏千'); // default is utf8
 urlencode('苏千', 'gbk'); // '%CB%D5%C7%A7'
 
 // decode gbk
-decode('%CB%D5%C7%A7', 'gbk'); // '苏千'
+urlencode.decode('%CB%D5%C7%A7', 'gbk'); // '苏千'
 
 // parse gbk querystring
-parse('nick=%CB%D5%C7%A7', {charset: 'gbk'}); // {nick: '苏千'}
+urlencode.parse('nick=%CB%D5%C7%A7', {charset: 'gbk'}); // {nick: '苏千'}
 
 // stringify obj with gbk encoding
 const str = 'x[y][0][v][w]=' + urlencode('雾空', 'gbk'); // x[y][0][v][w]=%CE%ED%BF%D5
 const obj =  {x: {y : [{v : {w : '雾空'}}]}};
-stringify(obj, {charset: 'gbk'});
+urlencode.stringify(obj, {charset: 'gbk'});