diff --git a/modules/ve-math/tools/makeSvgsAndCss.js b/modules/ve-math/tools/makeSvgsAndCss.js
index b92c629..a75e32d 100755
--- a/modules/ve-math/tools/makeSvgsAndCss.js
+++ b/modules/ve-math/tools/makeSvgsAndCss.js
@@ -30,7 +30,7 @@
 
 		function encodeURIComponentForCSS( str ) {
 			return encodeURIComponent( str )
-				.replace( /[!'\(\)\*]/g, function ( chr ) {
+				.replace( /[!'*()]/g, function ( chr ) {
 					return '%' + chr.charCodeAt( 0 ).toString( 16 );
 				} );
 		}
diff --git a/package.json b/package.json
index 5ffc29a..7abec17 100644
--- a/package.json
+++ b/package.json
@@ -6,11 +6,12 @@
 	"devDependencies": {
 		"eslint-config-wikimedia": "0.4.0",
 		"grunt": "1.0.1",
-		"grunt-banana-checker": "0.5.0",
+		"grunt-banana-checker": "0.6.0",
 		"grunt-contrib-watch": "1.0.0",
-		"grunt-eslint": "19.0.0",
-		"grunt-jsonlint": "1.0.7",
-		"grunt-stylelint": "0.7.0",
+		"grunt-eslint": "20.0.0",
+		"grunt-jsonlint": "1.1.0",
+		"grunt-stylelint": "0.8.0",
+		"stylelint": "7.8.0",
 		"stylelint-config-wikimedia": "0.4.1"
 	}
 }