diff --git a/README.md b/README.md
index 35a4ee1..6f93725 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ linqes
 <p align="center">
     <img alt="dotnet-version" src="https://img.shields.io/badge/JavaScript-ES6-EEEE00.svg"/>
     <img alt="dotnet-version" src="https://img.shields.io/badge/TypeScript-Declare-blue.svg"/>
-    <img alt="npm" src="https://img.shields.io/badge/npm-v1.0.4-FF3300.svg"/>
+    <img alt="npm" src="https://img.shields.io/badge/npm-v1.0.5-FF3300.svg"/>
     <img alt="license" src="https://img.shields.io/badge/license-MIT-FF00FF.svg"/>
 </p>
 
diff --git a/package.json b/package.json
index 20ade83..7b0eefb 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name" : "linqes",
-	"version" : "1.0.4",
+	"version" : "1.0.5",
 	"description" : "linq in es, automated extensions on prototype",
 	"main" : "index.js",
 	"types" : "types/index.d.ts",
diff --git a/types/index.d.ts b/types/index.d.ts
index 0dc8eb9..e3f0843 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -578,6 +578,8 @@ declare interface Array<T> {
 	 */
 	clear() : void
 
+	concat(source : IEnumerable<T>) : IEnumerable<T>
+
 	/**
 	 * Determines whether the array contains elements that match the conditions defined by the specified predicate.
 	 * @param match The delegate that defines the conditions of the elements to search for.
@@ -621,6 +623,14 @@ declare interface Array<T> {
 	 * @param index The zero-based index of the element to remove.
 	 */
 	removeAt(index : number) : T | undefined
+
+	join<TInner, TKey, TResult>(
+		inner : IEnumerable<TInner>,
+		keySelector : (item : T) => TKey,
+		innerKeySelector : (item : TInner) => TKey,
+		resultSelector : (outer : T, inner : TInner) => TResult,
+		comparer? : ((outerKey : TKey, innerKey : TKey) => boolean)) : IEnumerable<TResult>
+
 }
 
 /**