diff --git a/lib/ace/mode/javascript_highlight_rules.js b/lib/ace/mode/javascript_highlight_rules.js
index 38fe7100..6d6afa2b 100644
--- a/lib/ace/mode/javascript_highlight_rules.js
+++ b/lib/ace/mode/javascript_highlight_rules.js
@@ -119,13 +119,13 @@ JavaScriptHighlightRules = function() {
             regex : "[a-zA-Z_$][a-zA-Z0-9_$]*\\b"
         }, {
             token : "keyword.operator",
-            regex : "!|\\$|%|&|\\*|\\-\\-|\\-|\\+\\+|\\+|~|===|==|=|!=|!==|<=|>=|<<=|>>=|>>>=|<>|<|>|!|&&|\\|\\||\\?\\:|\\*=|%=|\\+=|\\-=|&=|\\^=|\\b(in|instanceof|new|delete|typeof|void)"
+            regex : "!|\\$|%|&|\\*|\\-\\-|\\-|\\+\\+|\\+|~|===|==|=|!=|!==|<=|>=|<<=|>>=|>>>=|<>|<|>|!|&&|\\|\\||\\?\\:|\\*=|%=|\\+=|\\-=|&=|\\^=|\\b(?:in|instanceof|new|delete|typeof|void)"
         }, {
             token : "lparen",
-            regex : "[\\[\\(\\{]"
+            regex : "[[({]"
         }, {
             token : "rparen",
-            regex : "[\\]\\)\\}]"
+            regex : "[\\])}]"
         }, {
             token : "text",
             regex : "\\s+"