diff --git a/Gruntfile.ts b/gruntfile.js
similarity index 91%
rename from Gruntfile.ts
rename to gruntfile.js
index 597ede16..edebddd7 100644
--- a/Gruntfile.ts
+++ b/gruntfile.js
@@ -1,6 +1,6 @@
-/* global module:false */
-module.exports = function(grunt) {
-	const sass = require('node-sass');
+const sass = require('node-sass');
+
+module.exports = grunt => {
 
 	require('load-grunt-tasks')(grunt);
 
@@ -93,10 +93,11 @@ module.exports = function(grunt) {
 					console: false,
 					unescape: false,
 					define: false,
-					exports: false
+					exports: false,
+					require: false
 				}
 			},
-			files: [ 'Gruntfile.js', 'js/reveal.js' ]
+			files: [ 'gruntfile.js', 'js/reveal.js' ]
 		},
 
 		connect: {
@@ -128,7 +129,7 @@ module.exports = function(grunt) {
 
 		watch: {
 			js: {
-				files: [ 'Gruntfile.js', 'js/reveal.js' ],
+				files: [ 'gruntfile.js', 'js/reveal.js' ],
 				tasks: 'js'
 			},
 			theme: {
@@ -161,6 +162,9 @@ module.exports = function(grunt) {
 
 	});
 
+	grunt.loadNpmTasks('grunt-contrib-clean');
+	grunt.loadNpmTasks('grunt-contrib-nodeunit');
+
 	// Default task
 	grunt.registerTask( 'default', [ 'css', 'js' ] );
 
diff --git a/package-lock.json b/package-lock.json
index ba506a75..9d36c31e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5441,12 +5441,6 @@
       "integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=",
       "dev": true
     },
-    "typescript": {
-      "version": "3.3.3333",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.3.3333.tgz",
-      "integrity": "sha512-JjSKsAfuHBE/fB2oZ8NxtRTk5iGcg6hkYXMnZ3Wc+b2RSqejEqTaem11mHASMnFilHrax3sLK0GDzcJrekZYLw==",
-      "dev": true
-    },
     "uglify-js": {
       "version": "3.3.8",
       "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.3.8.tgz",
diff --git a/package.json b/package.json
index cd6ccbe2..877f2e47 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
   },
   "devDependencies": {
     "express": "^4.16.2",
-    "grunt": "^1.0.3",
+    "grunt": "^1.0.4",
     "grunt-cli": "^1.3.2",
     "grunt-autoprefixer": "^3.0.4",
     "grunt-contrib-connect": "^2.0.0",
@@ -36,10 +36,9 @@
     "grunt-sass": "^3.0.2",
     "grunt-zip": "~0.17.1",
     "load-grunt-tasks": "^4.0.0",
-    "node-sass": "4.11.0",
+    "node-sass": "^4.11.0",
     "mustache": "^2.3.0",
-    "socket.io": "^2.2.0",
-    "typescript": "^3.3.3333"
+    "socket.io": "^2.2.0"
   },
   "license": "MIT"
 }