diff --git a/grammars/JavaScriptLexer.g4 b/grammars/JavaScriptLexer.g4
index 7e2bc0b..cd40084 100644
--- a/grammars/JavaScriptLexer.g4
+++ b/grammars/JavaScriptLexer.g4
@@ -37,7 +37,7 @@ options { superClass=JavaScriptBaseLexer; }
 HashBangLine:                   { self.isStartOfFile()}? '#!' ~[\r\n\u2028\u2029]*; // only allowed at start
 MultiLineComment:               '/*' .*? '*/'             -> channel(HIDDEN);
 SingleLineComment:              '//' ~[\r\n\u2028\u2029]* -> channel(HIDDEN);
-RegularExpressionLiteral:       '/' RegularExpressionFirstChar RegularExpressionChar* {self.isRegexPossible()}? '/' IdentifierPart*;
+//RegularExpressionLiteral:       '/' RegularExpressionFirstChar RegularExpressionChar* {self.isRegexPossible()}? '/' IdentifierPart*;
 
 OpenBracket:                    '[';
 CloseBracket:                   ']';
diff --git a/grammars/JavaScriptParser.g4 b/grammars/JavaScriptParser.g4
index b78c58e..2f01252 100644
--- a/grammars/JavaScriptParser.g4
+++ b/grammars/JavaScriptParser.g4
@@ -403,7 +403,7 @@ literal
     | BooleanLiteral
     | StringLiteral
 //    | TemplateStringLiteral
-    | RegularExpressionLiteral
+//    | RegularExpressionLiteral
     | numericLiteral
     | bigintLiteral
     ;