diff --git a/.jscsrc b/.jscsrc
index 023541b70e..6473d3f2ac 100644
--- a/.jscsrc
+++ b/.jscsrc
@@ -17,5 +17,9 @@
 		"requireNewlineAfterDescription": true,
 		"requireParamTypes": true,
 		"requireReturnTypes": true
-	}
+	},
+
+	"excludeFiles": [
+		"modules/ve-mw/init/classListSkipFunction.js"
+	]
 }
diff --git a/modules/ve-mw/init/classListSkipFunction.js b/modules/ve-mw/init/classListSkipFunction.js
index 4be1da4671..bb0c46f418 100644
--- a/modules/ve-mw/init/classListSkipFunction.js
+++ b/modules/ve-mw/init/classListSkipFunction.js
@@ -6,9 +6,9 @@
  * Adapted from http://purl.eligrey.com/github/classList.js/blob/master/classList.js
  */
 return !!(
-        'classList' in document.createElement( '_' ) &&
-        !(
-            document.createElementNS &&
-            !( 'classList' in document.createElementNS( 'http://www.w3.org/2000/svg', 'g' ) )
-        )
-    );
+	'classList' in document.createElement( '_' ) &&
+	!(
+		document.createElementNS &&
+		!( 'classList' in document.createElementNS( 'http://www.w3.org/2000/svg', 'g' ) )
+	)
+);
diff --git a/modules/ve-mw/init/ve.init.mw.ArticleTarget.js b/modules/ve-mw/init/ve.init.mw.ArticleTarget.js
index 4cc8e453c6..56b1fbf9d2 100644
--- a/modules/ve-mw/init/ve.init.mw.ArticleTarget.js
+++ b/modules/ve-mw/init/ve.init.mw.ArticleTarget.js
@@ -1724,9 +1724,9 @@ ve.init.mw.ArticleTarget.prototype.maybeShowWelcomeDialog = function () {
 		if ( prefSaysShow ) {
 			new mw.Api().saveOption( 'visualeditor-hidebetawelcome', '1' );
 
-		// No need to set a cookie every time for logged-in users that have already
-		// set the hidebetawelcome=1 preference, but only if this isn't a one-off
-		// view of the page via the hiding GET parameter.
+			// No need to set a cookie every time for logged-in users that have already
+			// set the hidebetawelcome=1 preference, but only if this isn't a one-off
+			// view of the page via the hiding GET parameter.
 		} else if ( !usePrefs && !urlSaysHide ) {
 			try {
 				localStorage.setItem( 've-beta-welcome-dialog', 1 );
diff --git a/modules/ve-mw/ui/widgets/ve.ui.MWAceEditorWidget.js b/modules/ve-mw/ui/widgets/ve.ui.MWAceEditorWidget.js
index fc62d5f9e3..5889b78211 100644
--- a/modules/ve-mw/ui/widgets/ve.ui.MWAceEditorWidget.js
+++ b/modules/ve-mw/ui/widgets/ve.ui.MWAceEditorWidget.js
@@ -117,7 +117,7 @@ ve.ui.MWAceEditorWidget.prototype.setupEditor = function () {
  *
  * @param {string} mode Symbolic name of autocomplete mode
  */
- ve.ui.MWAceEditorWidget.prototype.setAutocomplete = function ( mode ) {
+ve.ui.MWAceEditorWidget.prototype.setAutocomplete = function ( mode ) {
 	var widget = this;
 	this.autocomplete = mode;
 	this.loadingPromise.done( function () {
@@ -127,7 +127,7 @@ ve.ui.MWAceEditorWidget.prototype.setupEditor = function () {
 		} );
 	} );
 	return this;
- };
+};
 
 /**
  * @inheritdoc
diff --git a/modules/ve-mw/ui/widgets/ve.ui.MWTocWidget.js b/modules/ve-mw/ui/widgets/ve.ui.MWTocWidget.js
index 9c230a5e67..aa23472b72 100644
--- a/modules/ve-mw/ui/widgets/ve.ui.MWTocWidget.js
+++ b/modules/ve-mw/ui/widgets/ve.ui.MWTocWidget.js
@@ -84,7 +84,7 @@ OO.inheritClass( ve.ui.MWTocWidget, OO.ui.Widget );
  *
  * @param {ve.dm.MetaItem} metaItem
  */
- ve.ui.MWTocWidget.prototype.onMetaListInsert = function ( metaItem ) {
+ve.ui.MWTocWidget.prototype.onMetaListInsert = function ( metaItem ) {
 	// Responsible for adding UI components
 	if ( metaItem instanceof ve.dm.MWTOCForceMetaItem ) {
 		// show
diff --git a/package.json b/package.json
index 163fbd89eb..e0d528ebff 100644
--- a/package.json
+++ b/package.json
@@ -9,16 +9,16 @@
     "postdoc": "grunt copy:jsduck"
   },
   "devDependencies": {
-    "babel-polyfill": "6.8.0",
+    "babel-polyfill": "6.9.1",
     "grunt": "1.0.1",
     "grunt-banana-checker": "0.5.0",
     "grunt-contrib-copy": "1.0.0",
     "grunt-contrib-jshint": "1.0.0",
     "grunt-contrib-watch": "1.0.0",
-    "grunt-jscs": "2.8.0",
-    "grunt-jsonlint": "1.0.7",
-    "grunt-stylelint": "0.3.0",
+    "grunt-jscs": "3.0.0",
+    "grunt-jsonlint": "1.0.8",
+    "grunt-stylelint": "0.4.0",
     "grunt-tyops": "0.1.0",
-    "stylelint-config-wikimedia": "0.2.0"
+    "stylelint-config-wikimedia": "0.2.2"
   }
 }