 			params.name = name if name?
 
 			# Create request
-			@_post 'https://updown.io/api/checks/', params, (err, data) ->
-
-				# Reject if request errored
-				return reject(err) if err
-
-				# Resolve with response data
-				resolve(data)
-			
-
+			@_req 'POST', 'https://updown.io/api/checks/', params, (err, data) ->
+
+				# Reject if request errored
+				return reject(err) if err
+
+				# Resolve with response data
+				resolve(data)
+	
+
+
+	###
+	Adds new check
+	@param {string} token - The token 
+	@param {string} url - (optional) The new URL
+	@param {number} interval - (optional) The new interval in seconds (30, 60, 120, 300 or 600)
+	@param {string} name - (optional) A new alias for the check
+	###
+	modifyCheck: (token, url, interval, name) ->
+
+		# Create promise
+		new Promise (resolve, reject) =>
+
+			# Reject if we're in read-only mode
+			return reject new Error('Updown is set to read-only mode') if @readOnly
+
+			# Check if parameters are valid
+			return reject new TypeError('token parameter should be a string') if typeof token isnt 'string'
+			return reject new TypeError('url parameter should be a string') if url? and typeof url isnt 'string'
+			return reject new TypeError('interval parameter should be a number') if interval? and typeof interval isnt 'number'
+			return reject new RangeError('interval must be 30, 60, 120, 300 or 600') if interval? and interval not in [30, 60, 120, 300, 600]
+
+			# Assemble params
+			params = {}
+			params.url = url if url?
+			params.period = interval if interval?
+			params.name = name if name?
+
+			# Create request
+			@_req 'PUT', 'https://updown.io/api/checks/' + token, params, (err, data) ->
+
+				# Reject if request errored
+				return reject(err) if err
+
+				# Resolve with response data
+				resolve(data)
 
 # Export class
 module.exports = Updown
		# Handle result
		, (err, response, data) ->
			callback(err, data)


	###


	###
	Posts data to an URL with the Updown API key header
	@param {string} method - Method for the HTTP request
	@param {string} url - The API URL to post to
	@param {object} params - Parameters to be sent in the POST body
	@param {function} callback - Is called when the request completes
	###
	_req: (method, url, params, callback) ->

		# Initiate POST request
		request
			url: url
			method: method
			json: yes
			form: params
			headers:
