diff --git a/README.md b/README.md
index 75f1ed6..c2cc3dc 100644
--- a/README.md
+++ b/README.md
@@ -43,6 +43,7 @@ Using Laravel as your backend? Collect.js offers an (almost) identical api to [L
 
 All available methods
 
+- [add](#add)
 - [all](#all)
 - [average](#average)
 - [avg](#avg)
@@ -179,6 +180,16 @@ All comparisons in `collect.js` are done using strict equality. Using loose equa
 - ~~`whereInStrict`~~ use `whereIn()`
 - ~~`whereNotInStrict`~~ use `whereNotIn()`
 
+#### `add()`
+
+The add method adds a single item to the collection.
+
+```js
+collect([1, 2, 3, 4]).add(5);
+
+// [1, 2, 3, 4, 5]
+```
+
 #### `all()`
 
 The all method returns the underlying array or object represented by the collection:
@@ -3316,4 +3327,4 @@ PRs are welcomed to this project, and help is needed in order to keep up with th
 
 ### License
 
-MIT © [Daniel Eckermann](https://danieleckermann.com)
\ No newline at end of file
+MIT © [Daniel Eckermann](https://danieleckermann.com)
diff --git a/dist/index.js b/dist/index.js
index 5560ab9..e5e9e8c 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -32,6 +32,7 @@ Collection.prototype.toJSON = function toJSON() {
   return this.items;
 };
 
+Collection.prototype.add = require('./methods/add');
 Collection.prototype.all = require('./methods/all');
 Collection.prototype.average = require('./methods/average');
 Collection.prototype.avg = require('./methods/avg');
diff --git a/dist/methods/add.js b/dist/methods/add.js
new file mode 100644
index 0000000..c8fbc42
--- /dev/null
+++ b/dist/methods/add.js
@@ -0,0 +1,6 @@
+'use strict';
+
+module.exports = function add(item) {
+  this.items.push(item);
+  return this;
+};
\ No newline at end of file
diff --git a/docs/api/add.md b/docs/api/add.md
new file mode 100644
index 0000000..ea1a7bb
--- /dev/null
+++ b/docs/api/add.md
@@ -0,0 +1,12 @@
+# `add()`
+
+The add method adds a single item to the collection.
+
+```js
+collect([1, 2, 3, 4]).add(5);
+
+// [1, 2, 3, 4, 5]
+```
+
+
+[View source on GitHub](https://github.com/ecrmnn/collect.js/blob/master/src/methods/add.js)
diff --git a/index.d.ts b/index.d.ts
index 95618a0..f133214 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -6,6 +6,11 @@ declare module 'collect.js' {
   export class Collection<Item> {
     constructor(collection?: Item[] | Object);
 
+    /**
+     * The add method adds a single item to the collection.
+     */
+    add(item: Item): this;
+
     /**
      * The all method returns the underlying array represented by the collection.
      */
diff --git a/src/index.js b/src/index.js
index a62def5..bbf2cb9 100644
--- a/src/index.js
+++ b/src/index.js
@@ -28,6 +28,7 @@ Collection.prototype.toJSON = function toJSON() {
   return this.items;
 };
 
+Collection.prototype.add = require('./methods/add');
 Collection.prototype.all = require('./methods/all');
 Collection.prototype.average = require('./methods/average');
 Collection.prototype.avg = require('./methods/avg');
diff --git a/src/methods/add.js b/src/methods/add.js
new file mode 100644
index 0000000..69e99ad
--- /dev/null
+++ b/src/methods/add.js
@@ -0,0 +1,7 @@
+'use strict';
+
+module.exports = function add(item) {
+  this.items.push(item);
+
+  return this;
+};
diff --git a/test/methods/add_test.js b/test/methods/add_test.js
new file mode 100644
index 0000000..5b66d2c
--- /dev/null
+++ b/test/methods/add_test.js
@@ -0,0 +1,17 @@
+'use strict';
+
+module.exports = (it, expect, collect) => {
+  it('should append an item to the end of the collection', () => {
+    const collection = collect([1, 2, 3, 4]);
+
+    expect(collection.add(5).all()).to.eql([1, 2, 3, 4, 5]);
+  });
+
+  it('should modify the collection', () => {
+    const collection = collect([1, 2, 3, 4]);
+    expect(collection.all()).to.eql([1, 2, 3, 4]);
+
+    collection.add(5);
+    expect(collection.all()).to.eql([1, 2, 3, 4, 5]);
+  });
+};