diff --git a/content/lib/pc_py_wrapper.js b/content/lib/pc_py_wrapper.js
index 6389f2b9..cbd0d0f5 100644
--- a/content/lib/pc_py_wrapper.js
+++ b/content/lib/pc_py_wrapper.js
@@ -17,7 +17,7 @@ var $builtinmodule = function (name) {
     // The doc string cannot be added in code as is usually done in Python, so we set it manually here.
     mod.__doc__ = "This module provides implemention of the Pencil Code internal functions in Python.";
 
-	mod.Window = window
+	mod.Window = window;
 	
     // Sk.builtin.func creates a Python function out of a JS function
     mod.addalemon = new Sk.builtin.func(function (data) {
@@ -149,7 +149,7 @@ var $builtinmodule = function (name) {
 	   if (sprite === Sk.builtin.none.none$) {
             return click(function(eventData){
 				var data = [eventData.x, eventData.y];
-				Sk.misceval.callsim(func, Sk.ffi.remapToPy(data)); } );
+				Sk.misceval.callsim(func); } );
         }
        //return sprite.click( function () { Sk.misceval.callsim(fn); } );
     });
@@ -223,6 +223,13 @@ var $builtinmodule = function (name) {
        return sprite.say(Sk.ffi.remapToJs(a));
     });
 	
+	mod.audioplay = new Sk.builtin.func(function (sprite, url) {
+	Sk.builtin.pyCheckArgs("audioplay", arguments, 2, 2);
+		var urlplay = new Audio(Sk.ffi.remapToJs(url));
+
+		return urlplay.play();
+
+	});
 	 // TEXT METHODS /////////////////////////////////////////////////////////
     mod.write = new Sk.builtin.func(function (message) {
         Sk.builtin.pyCheckArgs("write", arguments, 1, 1);
@@ -413,7 +420,7 @@ var $builtinmodule = function (name) {
     });
 	
 	mod.fill = new Sk.builtin.func(function (sprite, color) {
-        Sk.builtin.pyCheckArgs("dot", arguments, 2, 2);
+        Sk.builtin.pyCheckArgs("fill", arguments, 2, 2);
 		if (sprite === Sk.builtin.none.none$) {
             return fill(Sk.ffi.remapToJs(color));
         }
@@ -447,9 +454,9 @@ var $builtinmodule = function (name) {
 	mod.drawon = new Sk.builtin.func(function (sprite, canvas) {
         Sk.builtin.pyCheckArgs("drawon", arguments, 2, 2);
 		if (sprite === Sk.builtin.none.none$) {
-            return drawon(Sk.ffi.remapToJs(canvas));
+            return drawon(canvas);
         }
-       return sprite.drawon(Sk.ffi.remapToJs(canvas));
+       return sprite.drawon(canvas);
     });
     
     mod.arrow = new Sk.builtin.func(function (sprite, color, size) {
@@ -477,24 +484,25 @@ var $builtinmodule = function (name) {
     });
     
     mod.touches = new Sk.builtin.func(function (sprite, obj) {
-        Sk.builtin.pyCheckArgs("touches", arguments, 2, 2);
+      Sk.builtin.pyCheckArgs("touches", arguments, 2, 2);
         if (sprite === Sk.builtin.none.none$) {
             return Sk.ffi.remapToPy(touches(Sk.ffi.remapToJs(obj)));
         }
-       return Sk.ffi.remapTOPy(sprite.touches(Sk.ffi.remapToJs(obj)));
+       return Sk.ffi.remapToPy(sprite.touches(Sk.ffi.remapToJs(obj)));
     });
     
     mod.inside = new Sk.builtin.func(function (sprite, obj) {
         Sk.builtin.pyCheckArgs("inside", arguments, 2, 2);
-		if(Sk.ffi.remapToJs(obj) == "window")
+		if(Sk.ffi.remapToJs(obj) == "window"){
 			if (sprite === Sk.builtin.none.none$) {
 				return Sk.ffi.remapToPy(inside(window));
 			}
 			return Sk.ffi.remapToPy(sprite.inside(window));
+		}
         if (sprite === Sk.builtin.none.none$) {
-            return Sk.ffi.remap.Py(inside(Sk.ffi.remapToJs(obj)));
+            return Sk.ffi.remapToPy(inside(obj));
         }
-       return Sk.ffi.remap.Py(sprite.inside(Sk.ffi.remapToJs(obj)));
+       return Sk.ffi.remapToPy(sprite.inside(obj));
     });    
     
 	//Operators
diff --git a/content/lib/pencilcode.py b/content/lib/pencilcode.py
index b3500b3f..bea049e2 100644
--- a/content/lib/pencilcode.py
+++ b/content/lib/pencilcode.py
@@ -61,7 +61,7 @@ def jumpxy(self, x, y):
         pencilcode_internal.jumpxy(self.jsSpriteObject, x, y)
     
     def pause(self, value):
-        pencilcode_internal.sleep(self.jsSpriteObject, value)
+        pencilcode_internal.pause(self.jsSpriteObject, value)
 	
     def getxy(self):
         return pencilcode_internal.getxy(self.jsSpriteObject)
@@ -105,7 +105,9 @@ def pd(self):
     	
     def box(self, a, b):
         pencilcode_internal.box(self.jsSpriteObject,a,b)
-    
+    def box(self, a):
+	pencilcode_internal.box(self.jsSpriteObject,a,10)
+
     def grow(self, a):
         pencilcode_internal.grow(self.jsSpriteObject,a)
     
@@ -124,8 +126,8 @@ def fill(self, color):
     def wear(self, name):
         pencilcode_internal.wear(self.jsSpriteObject,name)
     
-    def drawon(self, path):
-        pencilcode_internal.drawon(self.jsSpriteObject,path)
+    def drawon(self, canvas):
+        pencilcode_internal.drawon(self.jsSpriteObject,canvas.jsSpriteObject)
         
     #def cell(self, rows, columns):
     #    pencilcode_internal.cell(self.jsSpriteObject, rows, columns)
@@ -136,13 +138,13 @@ def shown(self):
     def hidden(self):
         return pencilcode_internal.hidden(self.jsSpriteObject)
         
-    def touches(self):
+    def touches(self, obj):
         return pencilcode_internal.touches(self.jsSpriteObject, obj)
         
-    def inside(self):
-        return pencilcode_internal.inside(self.jsSpriteObject, obj)
+    def inside(self, obj):
+
+        return pencilcode_internal.inside(self.jsSpriteObject, obj if obj == window else obj.jsSpriteObject)
 
-        
     ####################
     ## Sound Commands ##
     ####################
@@ -159,7 +161,9 @@ def silence(self):
     def say(self, a):
         pencilcode_internal.say(self.jsSpriteObject, a)
 
-
+    def audioplay(self, url):
+	player = pencilcode_internal.audioplay(self.jsSpriteObject, url)
+	
 # These commands act on the default turtle object (which is not wrapped.).
 
 ###################
@@ -211,7 +215,7 @@ def getxy():
 	return pencilcode_internal.getxy(None)
 	
 def pause(value):
-    pencilcode_internal.sleep(None, value)
+    pencilcode_internal.pause(None, value)
 
 ##################
 ## Art Commands ##
@@ -241,6 +245,9 @@ def pd():
 def box(a, b):
 	pencilcode_internal.box(None,a,b)
 
+def box(a):
+	pencilcode_internal.box(None,a,10)
+
 def grow(a):
 	pencilcode_internal.grow(None,a)
 	
@@ -262,8 +269,8 @@ def fill(color):
 def wear(name):
     pencilcode_internal.wear(None,name)
 
-def drawon(path):
-	pencilcode_internal.drawon(None,path)
+def drawon(canvas):
+	pencilcode_internal.drawon(None,canvas.jsSpriteObject)
 	
 def shown():
     return pencilcode_internal.shown(None)
@@ -275,8 +282,8 @@ def touches(obj):
     return pencilcode_internal.touches(None, obj)
     
 def inside(obj):
-    return pencilcode_internal.touches(None, obj)
-    
+
+	return pencilcode_internal.inside(None, obj if obj == window else obj.jsSpriteObject)
 ###################
 ## Text Commands ##
 ###################
@@ -341,7 +348,8 @@ def silence():
 	
 def say(a):
 	pencilcode_internal.say(None, a)
-	
+def audioplay(url):
+	pencilcode_internal.audioplay(None, url)
 ######################
 ## Control Commands ##
 ######################
diff --git a/content/src/filetype.js b/content/src/filetype.js
index db0ac21a..5d2fdd0f 100644
--- a/content/src/filetype.js
+++ b/content/src/filetype.js
@@ -185,9 +185,9 @@ function wrapTurtle(doc, domain, pragmasOnly, setupScript, instrumenter) {
   var originalLanguage = null;
   var seeline = '\n\n';
   if (meta.type == "text/x-python") {
-    maintype = "text/x-python"
+    maintype = 'text/x-python';
     seeline = '# Initialization / clearing goes here\n\n';
-    originalLanguage = 'python'
+    originalLanguage = 'python';
   }
   else {
     maintype = 'text/coffeescript';
@@ -208,9 +208,14 @@ function wrapTurtle(doc, domain, pragmasOnly, setupScript, instrumenter) {
     // Instruments the code for debugging, always producing javascript.
     var newText = instrumenter(text, originalLanguage);
     if (newText !== false) {
-      text = newText;
-      maintype = 'text/javascript';
-      instrumented = true;
+		text = newText;
+		instrumented = true;
+		if(originalLanguage == 'python') {
+			maintype = 'text/x-python';
+		}
+		else {
+			maintype = 'text/javascript';
+		}
     }
   }
   var mainscript = seeline;
@@ -384,8 +389,10 @@ function effectiveMeta(input) {
   if (meta && meta.type && meta.lib) { return meta; }
   meta = (meta && 'object' == typeof meta) ?
     JSON.parse(JSON.stringify(meta)) : {};
-	if(doc && doc.mimeType){
-		if (doc.mimeType.lastIndexOf('text/x-python', 0) === 0) {
+	//if(doc && doc.mimeType){
+	if(doc && doc.mimeType && doc.meta){
+		//if (doc.mimeType.lastIndexOf('text/x-python', 0) === 0) {
+		if (doc.meta.type == 'text/x-python') {
         meta.type = 'text/x-python';
         meta.libs = [{name: 'turtle', src: '//{site}/turtlebits.js'},
                      {name: 'skulpt.min', src: '//{site}/lib/skulpt.min.js'},
diff --git a/content/src/palette.js b/content/src/palette.js
index b1985321..6efb0564 100644
--- a/content/src/palette.js
+++ b/content/src/palette.js
@@ -816,7 +816,10 @@ module.exports = {
 	  {
 		  block: 'from pencilcode import *',
 		  title: 'Import Functions on the pencilcode file'
-	  }
+	  },{
+		block: 'import re',
+		title: 'Import Functions related to comparing strings'
+	}
 	  ])
 	}, {
       name: 'Move',
@@ -867,7 +870,10 @@ module.exports = {
         }, {
           block: 'jumpxy(30, 20)',
           title: 'Jump changing x and y without drawing'
-        }/* , {
+        }, {
+	block: 'pause(5)',
+	title: 'stop moveing for 5 seconds'
+	}/* , {
           block: 'pagexy()',
           title: 'Page (topleft-y-down {pageX:x, pageY:y}) coordinates'
         } */
@@ -892,6 +898,9 @@ module.exports = {
           block: 'while x < 10:\n  x+=1\nelse:\n pass',
           title: 'Repeat while a condition is true'
         }, {
+	block: 'break',
+	title: 'use in a for/while loop to break out of loop'
+	}, {
           block: 'if 0 == 0:\n  pass',
           title: 'Do something only if a condition is true'
         }, {
@@ -911,18 +920,36 @@ module.exports = {
         }, {
           block: "click (e) ->\n  ``",
           title: 'Do something when the mouse is clicked'*/
+     	}, {
+                        block: 'forever(lambda:\n fd(100))',
+                        title: 'Move forward forever'
         }, {
-			block: 'forever(main)',
-			title: 'Runs the function forever as fast as it can'
-		}, {
 			block: 'tick(60, main)',
 			title: 'Runs the function the number of times per second passed in, call tick(None, main) to stop running it'
-		}, {
-        block: 'def newfunction(x):\n fd(x)\n rt(90)',
-        title: 'Define a new function'
+	}, {
+          block: 'def buttonFunction():\n write(\'Button clicked\')',
+          title: 'Define a new function'
         }, {
-        block: 'newfunction(200)',
-        title: 'Use a custom function'
+          block: 'button(\'Write\', buttonFunction)',
+          title: 'Do something when a keyboard key is pressed'
+        }, {
+	block: 'keydown(lambda:\n write(\'Key pressed\'))',
+          title: 'Do something when a keyboard key is pressed'
+	}, {
+          block: 'def keydownFunction():\n write(\'Key pressed\')',
+          title: 'Define a new function'
+        }, {
+          block: 'keydown(keydownFunction, \'b\')',
+          title: 'Do something when a keyboard key is pressed'
+        }, {
+          block: 'def clickFunction():\n fd(100)',
+          title: 'Define a new function'
+        }, {
+          block: 'click(clickFunction)',
+          title: 'Do something when a keyboard key is pressed'
+        }, {
+          block: 'click(lambda:\n fd(100))',
+          title: 'Move to a location when document is clicked'
         }
       ])
     }, {
@@ -987,10 +1014,10 @@ module.exports = {
           block: 'inside(t)',
           title: 'True if the turtle is encircled by obj'
         } */, {
-          block: 'drawon(\'s\')',
+          block: 'drawon(s)',
           title: 'Draw on sprite s'
         }, {
-          block: 'drawon(\'document\')',
+          block: 'drawon(document)',
           title: 'Draw on the document'
         }
       ])
@@ -1022,16 +1049,21 @@ module.exports = {
         }, {
           block: 'say(\'hello\')',
           title: 'Speak a word'
-        }
+        }, {
+	  block: 'audioplay("url")',
+	expansion: 'audioplay(\'https://upload.wikimedia.org/wikipedia/commons/1/11/06_-_Vivaldi_Summer_mvt_3_Presto_-_John_Harrison_violin.ogg\')' ,
+	  title: 'play an audio file'
+	}
       ])
     }, {
      name: 'Operators',
      color: 'lightgreen',
      blocks: filterblocks([
        {
-           block: 'x = 0;',
+           block: 'x = 0',
            title: 'Set a variable',
            id: 'assign'
+
        }, {
            block: 'x += 1',
            title: 'Increase a variable',
@@ -1085,10 +1117,33 @@ module.exports = {
           block: 'min(_,_)',
           title: 'Get the smaller on two numbers'
        }, {
+		block: 'max(_,_)',
+		title: 'Get the larger on two numbers'
+	}, {
+		block: 'abs(_)',
+		title: 'Get the absolute value of a number'
+
+	}, {
+		block: 'round(_)',
+		title: 'round a number to the nearest integer'
+	}, {
 		   block: '_._',
 		   title: 'Call a function from inside of an object',
 		   id: 'dot'
-	   }
+	   }, {
+        block: 'def newfunction(x):\n fd(x)\n rt(90)',
+        title: 'Define a new function'
+        }, {
+        block: 'newfunction(200)',
+        title: 'Use a custom function'
+        }, {
+	block: 'return _',
+	title: 'Use inside a newfunction return a value'
+	}, {
+	block: 're.findall("pattern", x)',
+	title: 'find all instances of a pattern in x'
+	}
+
      ])
     }, {
       name: 'Sprites',
@@ -1115,15 +1170,15 @@ module.exports = {
         }, {
           block: 'f = table(5, 5)',
           title: 'Outputs a table with m rows and n columns'
-        }//, {
-         // block: 'if @touches x:\n  ``',
-         // title: 'Do something only if touching the object x'
-       // }, {
-       //   block: 'if @inside window:\n  ``',
-       //   title: 'Do something only if inside the window'
-        //}
+        }, {
+          block: 'if touches("green"):\n  pass',
+          title: 'Do something only if touching the color'
+        }, {
+          block: 'if inside(window):\n  pass',
+          title: 'Do something only if inside the window'
+        },
 	  ])
-	}, {
+	 }, {
       name: 'Text',
       color: 'pink',
       blocks: filterblocks([
@@ -1146,12 +1201,18 @@ module.exports = {
 			block: 'label(\'Spot\')',
 			title: 'Prints label at turtle position'
 		},{
+			block: 'input()',
+			title: 'reads an input from console'
+		}
+
+
+/*	{
            block: 'read(\'TextToBeRead\')',
            title: 'Type a new line to the document'
         },{
            block: 'readnum(\'2016\')',
            title: 'Type a new line to the document'
-        }//,{ 
+        }*/	//,{
 		//	block: 'while True:\n  x=input("Enter number")\n  if x.isdigit():\n    break', 
 		//	title: 'Read numbers only'
 		//},{
@@ -1598,7 +1659,7 @@ module.exports = {
     'movexy': {color: 'lightblue', dropdown: [py_types.sdistances, py_types.sdistances]},
     'jumpto': {color: 'lightblue', dropdown: [py_types.sdistances, py_types.sdistances]},
     'jumpxy': {color: 'lightblue', dropdown: [py_types.sdistances, py_types.sdistances]},
-	
+	'pause': {color: 'lightblue'},
     'pen': {color: 'purple', dropdown: [py_types.colors, py_types.sizes]},
     'dot': {color: 'purple', dropdown: [py_types.colors, py_types.sizes]},
 	'box': {color: 'purple', dropdown: [py_types.colors, py_types.sizes]},
@@ -1615,12 +1676,15 @@ module.exports = {
 	'arrow': {color: 'purple', dropdown: [py_types.colors]},
 	'shown': {color: 'purple'},
 	'hidden': {color: 'purple'},
-	'inside': {color: 'purple'},
+	'inside': {color: 'lightgreen'},
+	'touches': {color: 'lightgreen'},
+
 	//Sound
 	'play': {color: 'indigo'},
 	'tone': {color: 'indigo'},
 	'silence': {color: 'indigo'},
 	'say': {color: 'indigo'},
+	'audioplay': {color: 'indigo'},
 	//Control
 	'ht': {color: 'purple'},
     'cs': {color: 'purple'},
@@ -1633,6 +1697,12 @@ module.exports = {
 	'click': { color: 'orange' },
 	'forever': { color: 'orange'},
 	'tick': {color: 'orange', dropdown: [py_types.tickCount]},
+	'newfunction': {color: 'lightgreen'},
+	'min': {color: 'lightgreen'},
+	'max': {color: 'lightgreen'},
+	'abs': {color: 'lightgreen'},
+	'round': {color: 'lightgreen'},
+	're.findall': {color: 'lightgreen'},
 	//Sprites
 	'Sprite' : {color:'teal'},
 	'Piano' : {color:'teal'},
@@ -1649,7 +1719,8 @@ module.exports = {
 	'label' : {color: 'pink'},
 	'read': { color: 'pink' },
     'readnum': { color: 'pink' },
-
+	'len': {color:'lightgreen'},
+	'input': {color:'pink'},
  /*
     '?.slide': {color: 'lightblue', dropdown: [sdistances]},
     '?.fill': {color: 'purple', dropdown: [colors]},
@@ -1788,17 +1859,18 @@ module.exports = {
     conditionals: {color: 'orange'},
     value: {color: 'lightgreen'},
     command: {color: 'lightgreen'},
-    errors: {color: '#f00'}
+    errors: {color: '#f00'},
   },
 
 //  PYTHON_CATEGORIES: {
+
 //    functions: {color: 'lightgreen'},
 //    returns: {color: 'yellow'},
 //    comments: {color: 'gray'},
 //    arithmetic: {color: 'lightgreen'},
 //    logic: {color: 'lightgreen'},
 //    containers: {color: 'teal'},
-//    assignments: {color: 'lightgreen'},
+    assignments: {color: 'lightgreen'},
 //    loops: {color: 'orange'},
 //    conditionals: {color: 'orange'},
 //    value: {color: 'lightgreen'},
@@ -1815,3 +1887,4 @@ module.exports = {
     center: {category: 'grouping'}
   }
 };
+
diff --git a/content/src/view.js b/content/src/view.js
index 815c56b0..a61a7631 100644
--- a/content/src/view.js
+++ b/content/src/view.js
@@ -2185,7 +2185,10 @@ function showPaneEditorLanguagesDialog(pane) {
       'Coffeescript</label><br>' +
       '<label title="Use the Standard Web Language">' +
       '<input type="radio" value="text/javascript" name="lang"> ' +
-      'Javascript</label>' +
+      'Javascript</label><br>' +
+	  '<label title="Use the Python Language">' +
+      '<input type="radio" value="text/x-python" name="lang"> ' +
+      'Python</label>' +
       '</div>' +
       '<div style="padding:4px 5px 12px">' +
       '<label title="Edit Cascading Style Sheets">' +
diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index 0f41f7d0..49b23779 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -14,12 +14,32 @@
         "glob-to-regexp": "^0.3.0"
       }
     },
+    "@nodelib/fs.scandir": {
+      "version": "2.1.3",
+      "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.3.tgz",
+      "integrity": "sha512-eGmwYQn3gxo4r7jdQnkrrN6bY478C3P+a/y72IJukF8LjB6ZHeB3c+Ehacj3sYeSmUXGlnA67/PmbM9CVwL7Dw==",
+      "dev": true,
+      "requires": {
+        "@nodelib/fs.stat": "2.0.3",
+        "run-parallel": "^1.1.9"
+      }
+    },
     "@nodelib/fs.stat": {
-      "version": "1.1.3",
-      "resolved": "https://registry.npmjs.org/@nodelib/fs.stat/-/fs.stat-1.1.3.tgz",
-      "integrity": "sha512-shAmDyaQC4H92APFoIaVDHCx5bStIocgvbwQyxPRrbUY20V1EYTbSDchWbuwlMG3V17cprZhA6+78JfB+3DTPw==",
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/@nodelib/fs.stat/-/fs.stat-2.0.3.tgz",
+      "integrity": "sha512-bQBFruR2TAwoevBEd/NWMoAAtNGzTRgdrqnYCc7dhzfoNvqPzLyqlEQnzZ3kVnNrSp25iyxE00/3h2fqGAGArA==",
       "dev": true
     },
+    "@nodelib/fs.walk": {
+      "version": "1.2.4",
+      "resolved": "https://registry.npmjs.org/@nodelib/fs.walk/-/fs.walk-1.2.4.tgz",
+      "integrity": "sha512-1V9XOY4rDW0rehzbrcqAmHnz8e7SKvX27gh8Gt2WgB0+pdzdiLV83p72kZPU+jvMbS1qU5mauP2iOvO8rhmurQ==",
+      "dev": true,
+      "requires": {
+        "@nodelib/fs.scandir": "2.1.3",
+        "fastq": "^1.6.0"
+      }
+    },
     "@sindresorhus/is": {
       "version": "0.7.0",
       "resolved": "https://registry.npmjs.org/@sindresorhus/is/-/is-0.7.0.tgz",
@@ -27,13 +47,57 @@
       "dev": true,
       "optional": true
     },
+    "@testim/chrome-version": {
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/@testim/chrome-version/-/chrome-version-1.0.7.tgz",
+      "integrity": "sha512-8UT/J+xqCYfn3fKtOznAibsHpiuDshCb0fwgWxRazTT19Igp9ovoXMPhXyLD6m3CKQGTMHgqoxaFfMWaL40Rnw==",
+      "dev": true
+    },
+    "@types/color-name": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/@types/color-name/-/color-name-1.1.1.tgz",
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+      "resolved": "https://registry.npmjs.org/yargs-unparser/-/yargs-unparser-1.6.1.tgz",
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+        "decamelize": "^1.2.0",
+        "flat": "^4.1.0",
+        "is-plain-obj": "^1.1.0",
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+          "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-3.0.0.tgz",
+          "integrity": "sha1-zg6+ql94yxiSXqfYENe1mwEP1RU=",
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+        "string-width": {
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+          "requires": {
+            "emoji-regex": "^7.0.1",
+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^5.1.0"
+          }
+        },
+        "strip-ansi": {
+          "version": "5.2.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-5.2.0.tgz",
+          "integrity": "sha512-DuRs1gKbBqsMKIZlrffwlug8MHkcnpjs5VPmL1PAh+mA30U0DTotfDZ0d2UUsXpPmPmMMJ6W773MaA3J+lbiWA==",
+          "dev": true,
+          "requires": {
+            "ansi-regex": "^4.1.0"
+          }
+        },
+        "yargs": {
+          "version": "14.2.3",
+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-14.2.3.tgz",
+          "integrity": "sha512-ZbotRWhF+lkjijC/VhmOT9wSgyBQ7+zr13+YLkhfsSiTriYsMzkTUFP18pFhWwBeMa5gUc1MzbhrO6/VB7c9Xg==",
+          "dev": true,
+          "requires": {
+            "cliui": "^5.0.0",
+            "decamelize": "^1.2.0",
+            "find-up": "^3.0.0",
+            "get-caller-file": "^2.0.1",
+            "require-directory": "^2.1.1",
+            "require-main-filename": "^2.0.0",
+            "set-blocking": "^2.0.0",
+            "string-width": "^3.0.0",
+            "which-module": "^2.0.0",
+            "y18n": "^4.0.0",
+            "yargs-parser": "^15.0.1"
+          }
+        },
+        "yargs-parser": {
+          "version": "15.0.1",
+          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-15.0.1.tgz",
+          "integrity": "sha512-0OAMV2mAZQrs3FkNpDQcBk1x5HXb8X4twADss4S0Iuk+2dGnLOE/fRHrsYm542GduMveyA77OF4wrNJuanRCWw==",
+          "dev": true,
+          "requires": {
+            "camelcase": "^5.0.0",
+            "decamelize": "^1.2.0"
+          }
+        }
+      }
     },
     "yauzl": {
-      "version": "2.4.1",
-      "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.4.1.tgz",
-      "integrity": "sha1-lSj0QtqxsihOWLQ3m7GU4i4MQAU=",
+      "version": "2.10.0",
+      "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.10.0.tgz",
+      "integrity": "sha1-x+sXyT4RLLEIb6bY5R+wZnt5pfk=",
       "dev": true,
       "requires": {
-        "fd-slicer": "~1.0.1"
+        "buffer-crc32": "~0.2.3",
+        "fd-slicer": "~1.1.0"
       }
     }
   }
diff --git a/package.json b/package.json
index fa4cf709..120d2a05 100755
--- a/package.json
+++ b/package.json
@@ -29,19 +29,18 @@
     "parseurl": "latest",
     "seedrandom": "latest",
     "source-map": "latest",
-    "tamper": "latest"
+    "tamper": "latest",
+    "vlc": "0.0.4"
   },
   "devDependencies": {
     "browserify": "latest",
     "browserify-shim": "latest",
     "chai": "latest",
-    "grunt": "latest",
-    "mocha": "latest",
     "chai-as-promised": "latest",
-    "chromedriver": "latest",
-    "selenium-webdriver": "latest",
-    "grunt-browserify": "latest",
+    "chromedriver": "^85.0.1",
+    "grunt": "latest",
     "grunt-bowercopy": "latest",
+    "grunt-browserify": "latest",
     "grunt-cli": "latest",
     "grunt-contrib-concat": "latest",
     "grunt-contrib-copy": "latest",
@@ -52,8 +51,10 @@
     "grunt-express-server": "latest",
     "grunt-mocha-test": "latest",
     "grunt-string-replace": "latest",
+    "mocha": "latest",
     "node-phantom-simple": "latest",
     "phantomjs-prebuilt": "latest",
+    "selenium-webdriver": "^4.0.0-alpha.7",
     "watchify": "latest"
   },
   "browser": {
diff --git a/test/lib/testutil.js b/test/lib/testutil.js
index be1fc549..c6a313c5 100644
--- a/test/lib/testutil.js
+++ b/test/lib/testutil.js
@@ -23,7 +23,7 @@ exports.startChrome = function() {
   var driver = new selenium.Builder().
       withCapabilities(capabilities).
       build();
-  driver.getWindowHandle()
+  driver.getWindowHandle();
   driver.manage().setTimeouts({script: one_step_timeout});
   return driver;
 }