diff --git a/types/url-search-params/index.d.ts b/types/url-search-params/index.d.ts
index c58357a909..e1d559690e 100644
--- a/types/url-search-params/index.d.ts
+++ b/types/url-search-params/index.d.ts
@@ -1,20 +1,29 @@
-// Type definitions for url-search-params 0.10
+// Type definitions for url-search-params 1.1
 // Project: https://github.com/WebReflection/url-search-params
 // Definitions by: Nick <https://github.com/nick121212>
 //                 Neha <https://github.com/nrathi>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.1
 
+/**
+ * Based on definitions of lib.dom and  lib.dom.iteralbe
+ */
 declare class URLSearchParams {
-    constructor(init?: string | URLSearchParams | any);
-    append(name: string, value: any): void;
+    constructor(init?: string[][] | Record<string, string> | string | URLSearchParams);
+
+    append(name: string, value: string): void;
     delete(name: string): void;
-    entries(): Iterator<string>;
     get(name: string): string | null;
     getAll(name: string): string[];
     has(name: string): boolean;
-    keys(): Iterator<string>;
-    set(name: string, value: any): void;
-    values(): Iterator<string>;
+    set(name: string, value: string): void;
+    sort(): void;
+    forEach(callbackfn: (value: string, key: string, parent: URLSearchParams) => void, thisArg?: any): void;
+    [Symbol.iterator](): IterableIterator<[string, string]>;
+
+    entries(): IterableIterator<[string, string]>;
+    keys(): IterableIterator<string>;
+    values(): IterableIterator<string>;
 }
 
 export = URLSearchParams;
diff --git a/types/url-search-params/url-search-params-tests.ts b/types/url-search-params/url-search-params-tests.ts
index c468c692d0..74fee88f71 100644
--- a/types/url-search-params/url-search-params-tests.ts
+++ b/types/url-search-params/url-search-params-tests.ts
@@ -1,27 +1,33 @@
 import URLSearchParams = require("url-search-params");
 
-const params = new URLSearchParams('a=1&b=2');
+new URLSearchParams([["1", "2"]]);
+new URLSearchParams({ x: "y" });
+new URLSearchParams();
+new URLSearchParams(new URLSearchParams());
 
-params.append("b", 3);
+const params = new URLSearchParams("a=1&b=2");
 
+params.append("b", "3");
 params.delete("a");
 params.delete("c");
-
-params.entries();
-
 params.get("b");
-
 params.get("d");
-
 params.getAll("b");
-
 params.has("b");
-
 params.keys();
-
-params.set("b", 4);
-params.set("c", 5);
-
+params.set("b", "4");
+params.set("c", "5");
 params.toString();
-
 params.values();
+
+params.forEach((value, key, params) => {
+    const test: [string, string, URLSearchParams] = [value, key, params];
+});
+
+for (const [key, value] of params) {
+    const test: [string, string] = [key, value];
+}
+
+for (const [key, value] of params.entries()) {
+    const test: [string, string] = [key, value];
+}