diff --git a/pom.xml b/pom.xml
index cf0df67..a8e7d9c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -37,7 +37,7 @@
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>		
 		<jackson.version>[2.9.5,)</jackson.version>
-		<antlr4.version>4.5.1</antlr4.version>
+		<antlr4.version>4.9.2</antlr4.version>
 		<antlr3.version>3.5.2</antlr3.version>
 		<java.version>1.8</java.version>
 		<log4j.version>2.14.1</log4j.version>
diff --git a/src/main/antlr/collection/CollectionQueryLexer.g4 b/src/main/antlr/collection/CollectionQueryLexer.g4
index a829b39..f3906ad 100644
--- a/src/main/antlr/collection/CollectionQueryLexer.g4
+++ b/src/main/antlr/collection/CollectionQueryLexer.g4
@@ -47,7 +47,7 @@
 ON					: 'on';
 REF                 : 'referTo';
 WS 					: ( ' ' | '\t' | '\r' | '\n' )+ -> channel(HIDDEN);
-fragment NO_RE      : ~[ \t\/];
+
 fragment ALPHABET   : ~('\t' |
       ' ' | '/' | '*' | '?' | '+' | '{' | '}' | '[' | ']'
     | '(' | ')' | '|' | ',' | '\'' | '\\' | '!' | '=' | '~' | '&' | '^' | '<' | '>'