diff --git a/src/index.ts b/src/index.ts
index 1ff2245..2bf9718 100755
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,4 +1,4 @@
-import { decode } from 'he';
+import { decode, encode } from 'he';
 
 export enum NodeType {
 	ELEMENT_NODE = 1,
@@ -503,6 +503,44 @@ export class HTMLElement extends Node {
 		this._rawAttrs = attrs;
 		return attrs;
 	}
+
+	/**
+	 * Set an attribute value to the HTMLElement
+	 * @param {string} key The attribute name
+	 * @param {string} value The value to set, or null / undefined to remove an attribute
+	 */
+	setAttribute(key: string, value: string) {
+		//Update the attributes map
+		const attrs = this.attributes;
+		if(value===undefined || value===null) delete attrs[key];
+		else attrs[key] = value+'';
+		//Update the raw attributes
+		if(this._rawAttrs) {
+			if(value===undefined || value===null) delete this._rawAttrs[key];
+			else this._rawAttrs[key] = encode(value+'');
+		}
+		//Update rawString
+		this.rawAttrs = Object.keys(attrs).map(attr => attr+'='+encode(attrs[attr])).join(' ');
+	}
+
+	/**
+	 * Replace all the attributes of the HTMLElement by the provided attributes
+	 * @param {Attributes} attributes the new attribute set
+	 */
+	setAttributes(attributes: Attributes) {
+		//Update the attributes map
+		if(this.attributes) {
+			Object.keys(this.attributes).forEach(key => delete this.attributes[key]);
+			Object.keys(attributes).forEach(key => this.attributes[key] = attributes[key]+'');
+		}
+		//Update the raw attributes map
+		if(this.rawAttributes) {
+			Object.keys(this.rawAttributes).forEach(key => delete this.rawAttributes[key]);
+			Object.keys(attributes).forEach(key => this.rawAttributes[key] = encode(attributes[key]+''));
+		}
+		//Update rawString
+		this.rawAttrs = Object.keys(attributes).map(attr => attr+'='+encode(attributes[attr]+'')).join(' ');
+	}
 }
 
 interface MatherFunction { func: any; tagName: string; classes: string | string[]; attr_key: any; value: any; }
diff --git a/test/html.js b/test/html.js
index d50e7b9..519fa2f 100644
--- a/test/html.js
+++ b/test/html.js
@@ -316,6 +316,46 @@ describe('HTML Parser', function () {
 			});
 		});
 
+		describe('#setAttribute', function () {
+			it('should edit the attributes of the element', function () {
+				var root = parseHTML('<p a=12></p>');
+				root.firstChild.setAttribute('a', 13);
+				root.firstChild.attributes.should.eql({
+					'a': '13',
+				});
+				root.firstChild.toString().should.eql('<p a=13></p>');
+			});
+			it('should add an attribute to the element', function () {
+				var root = parseHTML('<p a=12></p>');
+				root.firstChild.setAttribute('b', 13);
+				root.firstChild.attributes.should.eql({
+					'a': '12',
+					'b': '13',
+				});
+				root.firstChild.toString().should.eql('<p a=12 b=13></p>');
+			});
+			it('should remove an attribute from the element', function () {
+				var root = parseHTML('<p a=12 b=13 c=14></p>');
+				root.firstChild.setAttribute('b', null);
+				root.firstChild.setAttribute('c');
+				root.firstChild.attributes.should.eql({
+					'a': '12',
+				});
+				root.firstChild.toString().should.eql('<p a=12></p>');
+			});
+		});
+
+		describe('#setAttributes', function () {
+			it('should return attributes of the element', function () {
+				var root = parseHTML('<p a=12 data-id="!$$&amp;" yAz=\'1\' class="" disabled></p>');
+				root.firstChild.setAttributes({c: 12});
+				root.firstChild.attributes.should.eql({
+					'c': '12',
+				});
+				root.firstChild.toString().should.eql('<p c=12></p>');
+			});
+		});
+
 		describe('#querySelector()', function () {
 			it('should return correct elements in DOM tree', function () {
 				var root = parseHTML('<a id="id" data-id="myid"><div><span class="a b"></span><span></span><span></span></div></a>');