diff --git a/src/index.ts b/src/index.ts
index 5a766da..12a5ed6 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,2 +1,6 @@
 export * from './parser';
 export * from './utils';
+export * from './lib/flinksql/FlinkSqlParserListener';
+export * from './lib/flinksql/FlinkSqlParserVisitor';
+export * from './lib/generic/SqlParserVisitor';
+export * from './lib/generic/SqlParserListener';
diff --git a/src/parser/flinksql.ts b/src/parser/flinksql.ts
index 5d5fe51..22e50a8 100644
--- a/src/parser/flinksql.ts
+++ b/src/parser/flinksql.ts
@@ -1,9 +1,6 @@
 import { InputStream, CommonTokenStream, Lexer } from 'antlr4';
 import { FlinkSqlLexer } from '../lib/flinksql/FlinkSqlLexer';
 import { FlinkSqlParser } from '../lib/flinksql/FlinkSqlParser';
-export * from '../lib/flinksql/FlinkSqlParserListener';
-export * from '../lib/flinksql/FlinkSqlParserVisitor';
-
 import BasicParser from './common/basicParser';
 
 export default class FlinkSQL extends BasicParser {
diff --git a/src/parser/generic.ts b/src/parser/generic.ts
index 9a12457..4a4e8e3 100644
--- a/src/parser/generic.ts
+++ b/src/parser/generic.ts
@@ -1,9 +1,6 @@
 import { InputStream, CommonTokenStream, Lexer } from 'antlr4';
 import { SqlLexer } from '../lib/generic/SqlLexer';
 import { SqlParser } from '../lib/generic/SqlParser';
-export * from '../lib/generic/SqlParserVisitor';
-export * from '../lib/generic/SqlParserListener';
-
 import BasicParser from './common/basicParser';
 
 export default class GenericSQL extends BasicParser {
diff --git a/src/parser/index.ts b/src/parser/index.ts
index 8858d79..a541081 100644
--- a/src/parser/index.ts
+++ b/src/parser/index.ts
@@ -1,8 +1,3 @@
-export * from './generic';
-export * from './plsql';
-export * from './hive';
-export * from './flinksql';
-export * from './spark';
 export { default as GenericSQL } from './generic';
 export { default as PLSQL } from './plsql';
 export { default as HiveSQL } from './hive';